25392121 has 4 divisors (see below), whose sum is σ = 25417600. Its totient is φ = 25366644.

The previous prime is 25392119. The next prime is 25392127. The reversal of 25392121 is 12129352.

It is a happy number.

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 25392121 - 2¹ = 25392119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25392127) 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, 11181 + ... + 13258.

It is an arithmetic number, because the mean of its divisors is an integer number (6354400).

Almost surely, 2^25392121 is an apocalyptic number.

It is an amenable number.

25392121 is a deficient number, since it is larger than the sum of its proper divisors (25479).

25392121 is a wasteful number, since it uses less digits than its factorization.

25392121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25478.

The product of its digits is 1080, while the sum is 25.

The square root of 25392121 is about 5039.0595352704. The cubic root of 25392121 is about 293.9226083181.

The spelling of 25392121 in words is "twenty-five million, three hundred ninety-two thousand, one hundred twenty-one".