Properties of the Number -3945

Nine Hundred Forty-Five

Basics

Value: -3946 → -3945 → -3944

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 263

Divisors: 1, 3, 5, 15, 263, 789, 1315, 3945

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111101101001

Octal: -7551

Duodecimal: -2349

Hexadecimal: -f69

Square: 15563025

Square Root: 62.80923498976882

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

Sequence is {a(7,n)}, where a(m,n) is defined in sequence A110665. A110672

Reversion of g.f. (with constant term included) for partition numbers. A66398

11-gonal (or hendecagonal) numbers: a(n) = n*(9·n-7)/2. A51682

Number of primes < prime(n)². A879

Main diagonal of A277320: a(n) = A048720(n, A065621(n)). A277699

Number of labeled simple graphs covering n vertices with a unique undirected cycle of length > 2. A372195

Number of integer compositions of n with product n. A335405

a(n) = a(n-1) + a(m) for n >= 4, where m = 2^p+1 + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1 and a(2) = a(3) = 3. A50065

Numbers k with exactly three distinct prime factors and such that cototient(k) is a square. A306670

Handsome numbers (A007532) representable as a sum of any positive powers of their digits in two distinct ways, not counting different powers of duplicated digits as distinct. A50240