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Properties of the Number -123256

One Hundred Twenty-Three Thousand Two Hundred Fifty-Six

Basics

Value: -123257 → -123256 → -123255

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 3 × 7 × 31 × 71

Divisors: 1, 2, 4, 7, 8, 14, 28, 31, 56, 62

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -11110000101111000

Octal: -360570

Duodecimal: -5B3B4

Hexadecimal: -1e178

Square: 15192041536

Square Root: 351.07833883622044

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

Doubly triangular numbers: a(n) = n*(n+1)*(n2+n+2)/8. A2817
a(n) is the smallest nonnegative integer that can be written as a sum of two distinct nonzero triangular numbers in exactly n ways or -1 if no such integer exists. A342326
Smallest number which is the sum of two positive triangular numbers in exactly n different ways. A52346
Numbers that have exactly 7 representations as a k-gonal number, P(m,k) = m*((k-2)*m - (k-4))/2, k and m >= 3. A321157
Smallest triangular number which begins with the concatenation of first n natural numbers. A77692
Length of period of continued fraction expansion of square root of 3n-1. A62345
Triangular numbers whose reverse is prime. A66751
Triangular numbers whose digit reversal is prime; trailing zeros are permitted. A115704
Numbers of the form prime(n) + prime(n+1) - 2 that are also triangular numbers, T(k) = k(k+1)/2. A110891