12521272 has 32 divisors (see below), whose sum is σ = 25084800. Its totient is φ = 5846400.

The previous prime is 12521239. The next prime is 12521291. The reversal of 12521272 is 27212521.

It is an alternating number because its digits alternate between odd and even.

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, 6322 + ... + 8062.

It is an arithmetic number, because the mean of its divisors is an integer number (783900).

Almost surely, 2^12521272 is an apocalyptic number.

It is an amenable number.

12521272 is an abundant number, since it is smaller than the sum of its proper divisors (12563528).

12521272 is a wasteful number, since it uses less digits than its factorization.

12521272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807 (or 1803 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The square root of 12521272 is about 3538.5409422529. The cubic root of 12521272 is about 232.2110149104.

Adding to 12521272 its reverse (27212521), we get a palindrome (39733793).

It can be divided in two parts, 12 and 521272, that added together give a square (521284 = 722²).

The spelling of 12521272 in words is "twelve million, five hundred twenty-one thousand, two hundred seventy-two".