15008561 has 2 divisors, whose sum is σ = 15008562. Its totient is φ = 15008560.

The previous prime is 15008527. The next prime is 15008579. The reversal of 15008561 is 16580051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10764961 + 4243600 = 3281^2 + 2060^2 .

It is a cyclic number.

It is not a de Polignac number, because 15008561 - 2¹⁰ = 15007537 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15008561.

It is not a weakly prime, because it can be changed into another prime (15005561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7504280 + 7504281.

It is an arithmetic number, because the mean of its divisors is an integer number (7504281).

Almost surely, 2^15008561 is an apocalyptic number.

It is an amenable number.

15008561 is a deficient number, since it is larger than the sum of its proper divisors (1).

15008561 is an equidigital number, since it uses as much as digits as its factorization.

15008561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 15008561 is about 3874.0884089034. The cubic root of 15008561 is about 246.6681168245.

The spelling of 15008561 in words is "fifteen million, eight thousand, five hundred sixty-one".