25215245 has 32 divisors (see below), whose sum is σ = 35610624. Its totient is φ = 16948800.

The previous prime is 25215221. The next prime is 25215251. The reversal of 25215245 is 54251252.

It is not a de Polignac number, because 25215245 - 2⁸ = 25214989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38894 + ... + 39536.

It is an arithmetic number, because the mean of its divisors is an integer number (1112832).

Almost surely, 2^25215245 is an apocalyptic number.

It is an amenable number.

25215245 is a deficient number, since it is larger than the sum of its proper divisors (10395379).

25215245 is a wasteful number, since it uses less digits than its factorization.

25215245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713.

The product of its digits is 4000, while the sum is 26.

The square root of 25215245 is about 5021.4783679709. The cubic root of 25215245 is about 293.2385505005.

Adding to 25215245 its reverse (54251252), we get a palindrome (79466497).

The spelling of 25215245 in words is "twenty-five million, two hundred fifteen thousand, two hundred forty-five".