25121244 has 24 divisors (see below), whose sum is σ = 61165440. Its totient is φ = 8009584.

The previous prime is 25121237. The next prime is 25121263. The reversal of 25121244 is 44212152.

It is a self number, because there is not a number n which added to its sum of digits gives 25121244.

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, 45234 + ... + 45785.

It is an arithmetic number, because the mean of its divisors is an integer number (2548560).

Almost surely, 2^25121244 is an apocalyptic number.

It is an amenable number.

25121244 is an abundant number, since it is smaller than the sum of its proper divisors (36044196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25121244 is a wasteful number, since it uses less digits than its factorization.

25121244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91049 (or 91047 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 25121244 is about 5012.1097354308. The cubic root of 25121244 is about 292.8737045335.

Adding to 25121244 its reverse (44212152), we get a palindrome (69333396).

The spelling of 25121244 in words is "twenty-five million, one hundred twenty-one thousand, two hundred forty-four".