25671917 has 4 divisors (see below), whose sum is σ = 26218176. Its totient is φ = 25125660.

The previous prime is 25671913. The next prime is 25671929. The reversal of 25671917 is 71917652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25671917 - 2² = 25671913 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 (25671913) 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, 273059 + ... + 273152.

It is an arithmetic number, because the mean of its divisors is an integer number (6554544).

Almost surely, 2^25671917 is an apocalyptic number.

It is an amenable number.

25671917 is a deficient number, since it is larger than the sum of its proper divisors (546259).

25671917 is an equidigital number, since it uses as much as digits as its factorization.

25671917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546258.

The product of its digits is 26460, while the sum is 38.

The square root of 25671917 is about 5066.7461945513. The cubic root of 25671917 is about 294.9982457044.

The spelling of 25671917 in words is "twenty-five million, six hundred seventy-one thousand, nine hundred seventeen".