25212242 has 16 divisors (see below), whose sum is σ = 41840064. Its totient is φ = 11298000.

The previous prime is 25212227. The next prime is 25212251. The reversal of 25212242 is 24221252.

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, 6509 + ... + 9632.

It is an arithmetic number, because the mean of its divisors is an integer number (2615004).

Almost surely, 2^25212242 is an apocalyptic number.

25212242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25212242 is a deficient number, since it is larger than the sum of its proper divisors (16627822).

25212242 is a wasteful number, since it uses less digits than its factorization.

25212242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16225.

The product of its digits is 640, while the sum is 20.

The square root of 25212242 is about 5021.1793435407. The cubic root of 25212242 is about 293.2269089938.

Adding to 25212242 its reverse (24221252), we get a palindrome (49433494).

The spelling of 25212242 in words is "twenty-five million, two hundred twelve thousand, two hundred forty-two".