25918121 has 8 divisors (see below), whose sum is σ = 26600640. Its totient is φ = 25239312.

The previous prime is 25918117. The next prime is 25918133. The reversal of 25918121 is 12181952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25918121 - 2² = 25918117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25918111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18191 + ... + 19563.

It is an arithmetic number, because the mean of its divisors is an integer number (3325080).

Almost surely, 2^25918121 is an apocalyptic number.

It is an amenable number.

25918121 is a deficient number, since it is larger than the sum of its proper divisors (682519).

25918121 is a wasteful number, since it uses less digits than its factorization.

25918121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855.

The product of its digits is 1440, while the sum is 29.

The square root of 25918121 is about 5090.9842859706. The cubic root of 25918121 is about 295.9382974930.

The spelling of 25918121 in words is "twenty-five million, nine hundred eighteen thousand, one hundred twenty-one".