Properties of the Number 42251

Forty-Two Thousand Two Hundred Fifty-One

Basics

Value: 42250 → 42251 → 42252

Parity: odd

Prime: No

Previous Prime: 42239

Next Prime: 42257

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 11 × 23 × 167

Divisors: 1, 11, 23, 167, 253, 1837, 3841, 42251

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010100001011

Octal: 122413

Duodecimal: 2054B

Hexadecimal: a50b

Square: 1785147001

Square Root: 205.55048041782825

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

Generalized Stirling numbers, [n+2,n]_2. A1701

Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a₂,b₂), with a₂>0 and b₂>0 such that, converting a₂ and b₂ to base 10 as a and b, we have σ(a + b) = σ(k). A258843

Number of integer partitions of n of length > 2 whose second differences have median 0. A360682

Numbers k such that σ(triangular(k)) = σ(k)². A232355

Numbers k such that k and k+1 have the same sum of squarefree divisors, or sqf(k) = sqf(k+1), where sqf(k) = A048250(k). A63964

Numbers k such that k and k + 1 have the same norm of the sum of unitary divisors in Gaussian integers (A332474). A332475

Numbers k such that abs(A328258(k)) = abs(A328258(k+1)). A348586

Number k such that A033634(k) = A033634(k+1). A349224

T(n,k) = Number of nondecreasing arrangements of n+3 numbers in 0..k with each number being the sum mod (k+1) of three others. A183904

Denominators of continued fraction convergents to sqrt(651). A42251