25845913 has 4 divisors (see below), whose sum is σ = 25879140. Its totient is φ = 25812688.

The previous prime is 25845889. The next prime is 25845959. The reversal of 25845913 is 31954852.

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 15586704 + 10259209 = 3948^2 + 3203^2 .

It is a cyclic number.

It is not a de Polignac number, because 25845913 - 2⁹ = 25845401 is a prime.

It is a super-2 number, since 2×25845913² = 1336022437607138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25845973) 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, 15418 + ... + 17011.

It is an arithmetic number, because the mean of its divisors is an integer number (6469785).

Almost surely, 2^25845913 is an apocalyptic number.

It is an amenable number.

25845913 is a deficient number, since it is larger than the sum of its proper divisors (33227).

25845913 is an equidigital number, since it uses as much as digits as its factorization.

25845913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33226.

The product of its digits is 43200, while the sum is 37.

The square root of 25845913 is about 5083.8875872702. The cubic root of 25845913 is about 295.6632134032.

The spelling of 25845913 in words is "twenty-five million, eight hundred forty-five thousand, nine hundred thirteen".