25212144 has 20 divisors (see below), whose sum is σ = 65131496. Its totient is φ = 8404032.

The previous prime is 25212137. The next prime is 25212149. The reversal of 25212144 is 44121252.

It is a self number, because there is not a number n which added to its sum of digits gives 25212144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25212149) 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, 262579 + ... + 262674.

Almost surely, 2^25212144 is an apocalyptic number.

25212144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25212144 is an abundant number, since it is smaller than the sum of its proper divisors (39919352).

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

25212144 is a wasteful number, since it uses less digits than its factorization.

25212144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525264 (or 525258 counting only the distinct ones).

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

The square root of 25212144 is about 5021.1695848677. The cubic root of 25212144 is about 293.2265290690.

Adding to 25212144 its reverse (44121252), we get a palindrome (69333396).

The spelling of 25212144 in words is "twenty-five million, two hundred twelve thousand, one hundred forty-four".