25676513 has 4 divisors (see below), whose sum is σ = 26561940. Its totient is φ = 24791088.

The previous prime is 25676503. The next prime is 25676549. The reversal of 25676513 is 31567652.

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 11175649 + 14500864 = 3343^2 + 3808^2 .

It is a cyclic number.

It is not a de Polignac number, because 25676513 - 2⁶ = 25676449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25676503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442670 + ... + 442727.

It is an arithmetic number, because the mean of its divisors is an integer number (6640485).

Almost surely, 2^25676513 is an apocalyptic number.

It is an amenable number.

25676513 is a deficient number, since it is larger than the sum of its proper divisors (885427).

25676513 is an equidigital number, since it uses as much as digits as its factorization.

25676513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885426.

The product of its digits is 37800, while the sum is 35.

The square root of 25676513 is about 5067.1997197663. The cubic root of 25676513 is about 295.0158490001.

The spelling of 25676513 in words is "twenty-five million, six hundred seventy-six thousand, five hundred thirteen".