Properties of the Number 81970

Eighty-One Thousand Nine Hundred Seventy

Basics

Value: 81969 → 81970 → 81971

Parity: even

Prime: No

Previous Prime: 81967

Next Prime: 81971

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 7 × 1171

Divisors: 1, 2, 5, 7, 10, 14, 35, 70, 1171, 2342

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10100000000110010

Octal: 240062

Duodecimal: 3B52A

Hexadecimal: 14032

Square: 6719080900

Square Root: 286.30403420140624

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 21. A159408

Number of n X n arrays of squares of integers with every 3X3 subblock summing to 21. A159223

a(n) = sum of numbers formed using the digits of next n numbers. A81993

Duplicate of A076098. A81970