Properties of the Number 1975

One Thousand Nine Hundred Seventy-Five

Basics

Value: 1974 → 1975 → 1976

Parity: odd

Prime: No

Previous Prime: 1973

Next Prime: 1979

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 ² × 79

Divisors: 1, 5, 25, 79, 395, 1975

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110110111

Octal: 3667

Duodecimal: 1187

Hexadecimal: 7b7

Square: 3900625

Square Root: 44.44097208657794

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

Number of partitions of n with nonnegative rank. A64174

Total number of ON states after n generations of cellular automaton based on hexagons. A151723

Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n and height k (1 <= k <= n). A80936

Expansion of ∏_m>0 (1+q^m)^m(m+1/2). A28377

Number of integer compositions of n whose leaders of strictly increasing runs are distinct. A374687

Number of partitions of n such that the successive differences of consecutive parts are strictly increasing. A240027

a(n) = (2·n-1)*(n² -n +2)/2. A63488

Numbers with exactly 9 ones in binary expansion. A23691

a(n) = (2·n - 1)*(7·n² - 7·n + 3)/3. A63494

Number of 2n-step 2-dimensional closed self-avoiding paths on square lattice, reduced for symmetry, i.e., where rotations and reflections are not counted as distinct. A266549