25613671 has 4 divisors (see below), whose sum is σ = 25631200. Its totient is φ = 25596144.

The previous prime is 25613663. The next prime is 25613683. The reversal of 25613671 is 17631652.

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 25613671 - 2³ = 25613663 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 (25613771) 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, 6351 + ... + 9568.

It is an arithmetic number, because the mean of its divisors is an integer number (6407800).

Almost surely, 2^25613671 is an apocalyptic number.

25613671 is a deficient number, since it is larger than the sum of its proper divisors (17529).

25613671 is a wasteful number, since it uses less digits than its factorization.

25613671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17528.

The product of its digits is 7560, while the sum is 31.

The square root of 25613671 is about 5060.9950602624. The cubic root of 25613671 is about 294.7749734663.

The spelling of 25613671 in words is "twenty-five million, six hundred thirteen thousand, six hundred seventy-one".