Properties of the Number 1956

One Thousand Nine Hundred Fifty-Six

Basics

Value: 1955 → 1956 → 1957

Parity: even

Prime: No

Previous Prime: 1951

Next Prime: 1973

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 163

Divisors: 1, 2, 3, 4, 6, 12, 163, 326, 489, 652

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 11110100100

Octal: 3644

Duodecimal: 1170

Hexadecimal: 7a4

Square: 3825936

Square Root: 44.22668877499196

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

9-gonal (or enneagonal or nonagonal) numbers: a(n) = n*(7·n-5)/2. A1106

a(n) = (n³ + 2·n)/3. A6527

a(n) = n*(a(n-1) + 1), a(0) = 0. A7526

Generalized 9-gonal (or enneagonal) numbers: m*(7·m - 5)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A118277

Number of integer partitions of n whose product of parts is not n. A379736

a(n) = a(n-2) + a(n-3) + a(n-4) - a(n-6), with a(0) = a(2) = a(3) = 1, a(1) = 0 and a(4) = a(5) = 2. A143438

Left diagonal of partition triangle A047812. A7042

Numbers m such that there are precisely 15 groups of order m. A294156

Numbers k whose largest divisor <= sqrt(k) equals 12. A162532

Triangle read by rows: T(n,k) = number of edges in a "frame" of size n X k (see Comments in A331457 for definition). A332600