25021312 has 16 divisors (see below), whose sum is σ = 49847400. Its totient is φ = 12510592.

The previous prime is 25021307. The next prime is 25021327. The reversal of 25021312 is 21312052.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97612 + ... + 97867.

Almost surely, 2^25021312 is an apocalyptic number.

It is an amenable number.

25021312 is a deficient number, since it is larger than the sum of its proper divisors (24826088).

25021312 is an equidigital number, since it uses as much as digits as its factorization.

25021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195493 (or 195481 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 25021312 is about 5002.1307459922. The cubic root of 25021312 is about 292.4848391100.

Adding to 25021312 its reverse (21312052), we get a palindrome (46333364).

The spelling of 25021312 in words is "twenty-five million, twenty-one thousand, three hundred twelve".