Properties of the Number -139656

One Hundred Thirty-Nine Thousand Six Hundred Fifty-Six

Basics

Value: -139657 → -139656 → -139655

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 11 × 23 ²

Divisors: 1, 2, 3, 4, 6, 8, 11, 12, 22, 23

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100010000110001000

Octal: -420610

Duodecimal: -689A0

Hexadecimal: -22188

Square: 19503798336

Square Root: 373.7057666132542

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) = n² * (n² - 1)/2. A83374

Let T(n) = n(n+1)/2 be the n-th triangular number (A000217); a(n) = T(8T(n)). A185096

Number of 2 X 2 matrices with all terms in {0,1,...,n} and odd trace. A210379

a(n) = 9973·n + 10007. A101442

Triangular numbers that are the product of a triangular number and a square number (both greater than 1). A253650

a(n) = ((n-th prime)⁴-(n-th prime)²)/2. A138418

Triangular numbers that are sums of twin prime pairs. A165966

Triangular numbers that are the product of a triangular number and an oblong number. A253652

Smallest triangular number having n² as divisor. A80983