Properties of the Number 39942

Thirty-Nine Thousand Nine Hundred Forty-Two

Basics

Value: 39941 → 39942 → 39943

Parity: even

Prime: No

Previous Prime: 39937

Next Prime: 39953

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 7 × 317

Divisors: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001110000000110

Octal: 116006

Duodecimal: 1B146

Hexadecimal: 9c06

Square: 1595363364

Square Root: 199.85494739935763

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

Numbers that are the sum of four third powers in exactly seven ways. A345151

Number T(n,k) of permutations of [n] with exactly k (possibly overlapping, cyclic wrap-around) occurrences of the consecutive step pattern UDU (U=up, D=down); triangle T(n,k), n>=0, 0<=k<=floor(n/2), read by rows. A232933

Number of permutations of [n] cyclically avoiding the consecutive step pattern UDU (U=up, D=down). A232899

Numbers k such that φ(k)+σ(k) is a perfect cube. A61366

E.g.f. A(x) satisfies: A'(x) = 1 + A(A(A(x))). A193098

Sum of the odd parts in the partitions of n into 7 parts. A309624

Number of points needed to display n on the LCD (liquid-crystal display) of a TI-83 calculator. A39942