25857013 has 16 divisors (see below), whose sum is σ = 32054400. Its totient is φ = 20310336.

The previous prime is 25856981. The next prime is 25857031. The reversal of 25857013 is 31075852.

It is a cyclic number.

It is not a de Polignac number, because 25857013 - 2⁵ = 25856981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25857053) 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, 12606 + ... + 14512.

It is an arithmetic number, because the mean of its divisors is an integer number (2003400).

Almost surely, 2^25857013 is an apocalyptic number.

It is an amenable number.

25857013 is a deficient number, since it is larger than the sum of its proper divisors (6197387).

25857013 is a wasteful number, since it uses less digits than its factorization.

25857013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 25857013 is about 5084.9791543329. The cubic root of 25857013 is about 295.7055333368.

The spelling of 25857013 in words is "twenty-five million, eight hundred fifty-seven thousand, thirteen".