25525613 has 2 divisors, whose sum is σ = 25525614. Its totient is φ = 25525612.

The previous prime is 25525609. The next prime is 25525627. The reversal of 25525613 is 31652552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17156164 + 8369449 = 4142^2 + 2893^2 .

It is a cyclic number.

It is not a de Polignac number, because 25525613 - 2² = 25525609 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25525663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12762806 + 12762807.

It is an arithmetic number, because the mean of its divisors is an integer number (12762807).

Almost surely, 2^25525613 is an apocalyptic number.

It is an amenable number.

25525613 is a deficient number, since it is larger than the sum of its proper divisors (1).

25525613 is an equidigital number, since it uses as much as digits as its factorization.

25525613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 29.

The square root of 25525613 is about 5052.2878975767. The cubic root of 25525613 is about 294.4367803973.

The spelling of 25525613 in words is "twenty-five million, five hundred twenty-five thousand, six hundred thirteen".