25655207 has 4 divisors (see below), whose sum is σ = 25667280. Its totient is φ = 25643136.

The previous prime is 25655191. The next prime is 25655209. The reversal of 25655207 is 70255652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25655207 - 2⁴ = 25655191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25655209) 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, 1907 + ... + 7412.

It is an arithmetic number, because the mean of its divisors is an integer number (6416820).

Almost surely, 2^25655207 is an apocalyptic number.

25655207 is a deficient number, since it is larger than the sum of its proper divisors (12073).

25655207 is an equidigital number, since it uses as much as digits as its factorization.

25655207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12072.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 25655207 is about 5065.0969388552. The cubic root of 25655207 is about 294.9342264546.

The spelling of 25655207 in words is "twenty-five million, six hundred fifty-five thousand, two hundred seven".