Properties of the Number -156520

One Hundred Fifty-Six Thousand Five Hundred Twenty

Basics

Value: -156521 → -156520 → -156519

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 5 × 7 × 13 × 43

Divisors: 1, 2, 4, 5, 7, 8, 10, 13, 14, 20

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110001101101000

Octal: -461550

Duodecimal: -766B4

Hexadecimal: -26368

Square: 24498510400

Square Root: 395.6260860964555

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

Nonpalindromic triangular numbers whose digit reversal is also a triangular number (possibly with fewer digits). A69673

Triangular numbers whose digit reversal is also a triangular number. A61455

θ series of A₇ lattice. A8447

Numbers that have exactly 8 representations as a k-gonal number, P(m,k) = m*((k-2)*m - (k-4))/2, k and m >= 3. A321158

a(n) = n*(n² - 1)*(n + 2)*(n² + 4·n + 6)/72. A54563

Least triangular number whose digit permutations yield exactly n further triangular numbers. A95870

Triangular numbers whose digit reversal is a brilliant number (A078972). A115678

Expansion of x²*(10-5·x+x²)/((1-x)⁴*(1-x²)). A331429

Expansion of 1/((1-3·x)*(1-4·x)*(1-9·x)). A16909

a(1) = 0, then smallest triangular number such that a(n+1)- a(n) is a palindrome. A75057