25670971 has 4 divisors (see below), whose sum is σ = 25996000. Its totient is φ = 25345944.

The previous prime is 25670963. The next prime is 25671011. The reversal of 25670971 is 17907652.

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 25670971 - 2³ = 25670963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25670971.

It is not an unprimeable number, because it can be changed into a prime (25670171) 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, 162396 + ... + 162553.

It is an arithmetic number, because the mean of its divisors is an integer number (6499000).

Almost surely, 2^25670971 is an apocalyptic number.

25670971 is a deficient number, since it is larger than the sum of its proper divisors (325029).

25670971 is an equidigital number, since it uses as much as digits as its factorization.

25670971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325028.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 25670971 is about 5066.6528398934. The cubic root of 25670971 is about 294.9946221370.

The spelling of 25670971 in words is "twenty-five million, six hundred seventy thousand, nine hundred seventy-one".