25290913 has 4 divisors (see below), whose sum is σ = 25422148. Its totient is φ = 25159680.

The previous prime is 25290901. The next prime is 25290953. The reversal of 25290913 is 31909252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2471184 + 22819729 = 1572^2 + 4777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25290913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25290953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65328 + ... + 65713.

It is an arithmetic number, because the mean of its divisors is an integer number (6355537).

Almost surely, 2^25290913 is an apocalyptic number.

It is an amenable number.

25290913 is a deficient number, since it is larger than the sum of its proper divisors (131235).

25290913 is a wasteful number, since it uses less digits than its factorization.

25290913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131234.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 25290913 is about 5029.0071584757. The cubic root of 25290913 is about 293.5315824376.

The spelling of 25290913 in words is "twenty-five million, two hundred ninety thousand, nine hundred thirteen".