25258865 has 8 divisors (see below), whose sum is σ = 30486888. Its totient is φ = 20089600.

The previous prime is 25258859. The next prime is 25258867. The reversal of 25258865 is 56885252.

It can be written as a sum of positive squares in 4 ways, for example, as 5125696 + 20133169 = 2264^2 + 4487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25258865 - 2⁸ = 25258609 is a prime.

It is a super-2 number, since 2×25258865² = 1276020522176450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25258867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13736 + ... + 15465.

It is an arithmetic number, because the mean of its divisors is an integer number (3810861).

Almost surely, 2^25258865 is an apocalyptic number.

It is an amenable number.

25258865 is a deficient number, since it is larger than the sum of its proper divisors (5228023).

25258865 is a wasteful number, since it uses less digits than its factorization.

25258865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29379.

The product of its digits is 192000, while the sum is 41.

The square root of 25258865 is about 5025.8198336192. The cubic root of 25258865 is about 293.4075447851.

The spelling of 25258865 in words is "twenty-five million, two hundred fifty-eight thousand, eight hundred sixty-five".