25215142 has 16 divisors (see below), whose sum is σ = 38416752. Its totient is φ = 12411360.

The previous prime is 25215137. The next prime is 25215161. The reversal of 25215142 is 24151252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40828 + ... + 41440.

It is an arithmetic number, because the mean of its divisors is an integer number (2401047).

Almost surely, 2^25215142 is an apocalyptic number.

25215142 is a deficient number, since it is larger than the sum of its proper divisors (13201610).

25215142 is a wasteful number, since it uses less digits than its factorization.

25215142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903.

The product of its digits is 800, while the sum is 22.

The square root of 25215142 is about 5021.4681120166. The cubic root of 25215142 is about 293.2381512234.

Adding to 25215142 its reverse (24151252), we get a palindrome (49366394).

The spelling of 25215142 in words is "twenty-five million, two hundred fifteen thousand, one hundred forty-two".