854

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Number

$854$ (eight hundred and fifty-four) is:

$2 \times 7 \times 61$

The $2$nd, with $567$, of $2$ positive integers which, together with their square, use all the digits from $1$ to $9$:

$854^2 = 729 \, 316$

Also see

• Previous: Penholodigital Square Equation

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $567$
• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $854$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $567$