25651967 has 4 divisors (see below), whose sum is σ = 27983976. Its totient is φ = 23319960.

The previous prime is 25651943. The next prime is 25651987. The reversal of 25651967 is 76915652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25651967 - 2⁸ = 25651711 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 (25651987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165988 + ... + 1166009.

It is an arithmetic number, because the mean of its divisors is an integer number (6995994).

Almost surely, 2^25651967 is an apocalyptic number.

25651967 is a deficient number, since it is larger than the sum of its proper divisors (2332009).

25651967 is a wasteful number, since it uses less digits than its factorization.

25651967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332008.

The product of its digits is 113400, while the sum is 41.

The square root of 25651967 is about 5064.7770928245. Note that the first 3 decimals coincide. The cubic root of 25651967 is about 294.9218101691.

The spelling of 25651967 in words is "twenty-five million, six hundred fifty-one thousand, nine hundred sixty-seven".