Properties of the Number 15045

Fifteen Thousand Forty-Five

Basics

Value: 15044 → 15045 → 15046

Parity: odd

Prime: No

Previous Prime: 15031

Next Prime: 15053

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 17 × 59

Divisors: 1, 3, 5, 15, 17, 51, 59, 85, 177, 255

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11101011000101

Octal: 35305

Duodecimal: 8859

Hexadecimal: 3ac5

Square: 226352025

Square Root: 122.65806129235861

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

Odd composite numbers k such that cototient(k) - φ(k) = k - 2*φ(k) is an odd prime. A83255

Number of ways to place 4 nonattacking semi-queens on an n X n board. A202655

Primitive elements of A119432. A119433

Triangle of coefficients of p(x,n) = (1/3)*(1-x)ⁿ⁺¹*∑_{m >= 0} ((5·m+4)ⁿ - (5·m+1)ⁿ)*x^m, read by rows. A154855

Riordan array (1, x*(1-x)/(1-3·x+x²)). A188137

Products p·q*r·s of distinct primes for which (p·q*r·s + 1)/2 is prime. A234501

Odd numbers that are not of the form p + 2^a + 2^b with b > a > 0, and p prime. A268693

a(n) = A077702(n+1)/A077702(n). A77703

a(n) = K₃(n) = ∑_k>=0 A090285(3,k)*2^k*binomial(n,k). a(n) = (4·n³+30·n²+56·n+15)/3. A90294

Number of compositions of n where the difference between largest and smallest parts equals seven. A323124