25620513 has 16 divisors (see below), whose sum is σ = 36550080. Its totient is φ = 15906816.

The previous prime is 25620509. The next prime is 25620533. The reversal of 25620513 is 31502652.

It is not a de Polignac number, because 25620513 - 2² = 25620509 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25620533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2358 + ... + 7536.

It is an arithmetic number, because the mean of its divisors is an integer number (2284380).

Almost surely, 2^25620513 is an apocalyptic number.

It is an amenable number.

25620513 is a deficient number, since it is larger than the sum of its proper divisors (10929567).

25620513 is a wasteful number, since it uses less digits than its factorization.

25620513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5296.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 25620513 is about 5061.6709691563. The cubic root of 25620513 is about 294.8012181855.

The spelling of 25620513 in words is "twenty-five million, six hundred twenty thousand, five hundred thirteen".