Properties of the Number -7645

Six Hundred Forty-Five

Basics

Value: -7646 → -7645 → -7644

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 11 × 139

Divisors: 1, 5, 11, 55, 139, 695, 1529, 7645

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1110111011101

Octal: -16735

Duodecimal: -4511

Hexadecimal: -1ddd

Square: 58446025

Square Root: 87.43569065318808

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

Triangle of Lehmer-Comtet numbers of the first kind. A8296

Triangle c(n,k) of the numerators of coefficients [x^k] P(n,x) of the polynomials P(n,x) of A129891. A140749

Triangle of coefficients of Gaussian polynomials [2n+5,5]_q represented as finite sum of terms (1+q²)^k*q^g-k, where k = 0,1,...,g with g=5n. A267485

Triangle read by rows: matrix inverse of the central factorial numbers T(2·n, 2·k) (A036969). A204579

Central Lehmer-Comtet numbers of the first kind: a(n) = A008296(2n,n). A298511

Triangle of central factorial numbers |t(2n,2n-2k)| read by rows. A8955

Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,3. A37576

Central factorial numbers: 2nd subdiagonal of A008955. A1820

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011. A260767

Numbers whose binary representation traces a nonselfcrossing circuit in honeycomb lattice when its bits (from the least to the second most significant bit) are interpreted as directions to proceed at each vertex. (The most significant 1-bit is ignored). A255571