25616425 has 24 divisors (see below), whose sum is σ = 33312600. Its totient is φ = 19514880.

The previous prime is 25616419. The next prime is 25616471. The reversal of 25616425 is 52461652.

It can be written as a sum of positive squares in 12 ways, for example, as 8202496 + 17413929 = 2864^2 + 4173^2 .

It is not a de Polignac number, because 25616425 - 2¹⁷ = 25485353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64327 + ... + 64723.

It is an arithmetic number, because the mean of its divisors is an integer number (1388025).

Almost surely, 2^25616425 is an apocalyptic number.

25616425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25616425 is a deficient number, since it is larger than the sum of its proper divisors (7696175).

25616425 is a wasteful number, since it uses less digits than its factorization.

25616425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 520 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 25616425 is about 5061.2671338312. The cubic root of 25616425 is about 294.7855378921.

The spelling of 25616425 in words is "twenty-five million, six hundred sixteen thousand, four hundred twenty-five".