25615265 has 32 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 17950464.

The previous prime is 25615259. The next prime is 25615297. The reversal of 25615265 is 56251652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25615265 is a prime.

It is a super-2 number, since 2×25615265² = 1312283602040450, which contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 201632 + ... + 201758.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^25615265 is an apocalyptic number.

It is an amenable number.

25615265 is a deficient number, since it is larger than the sum of its proper divisors (9221215).

25615265 is a wasteful number, since it uses less digits than its factorization.

25615265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281.

The product of its digits is 18000, while the sum is 32.

The square root of 25615265 is about 5061.1525367252. The cubic root of 25615265 is about 294.7810881899.

The spelling of 25615265 in words is "twenty-five million, six hundred fifteen thousand, two hundred sixty-five".