12521268 has 18 divisors (see below), whose sum is σ = 31651074. Its totient is φ = 4173744.

The previous prime is 12521239. The next prime is 12521291. The reversal of 12521268 is 86212521.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11985444 + 535824 = 3462^2 + 732^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173871 + ... + 173942.

It is an arithmetic number, because the mean of its divisors is an integer number (1758393).

Almost surely, 2^12521268 is an apocalyptic number.

12521268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12521268 is an abundant number, since it is smaller than the sum of its proper divisors (19129806).

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

12521268 is a wasteful number, since it uses less digits than its factorization.

12521268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347823 (or 347818 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 12521268 is about 3538.5403770481. The cubic root of 12521268 is about 232.2109901833.

Adding to 12521268 its reverse (86212521), we get a palindrome (98733789).

The spelling of 12521268 in words is "twelve million, five hundred twenty-one thousand, two hundred sixty-eight".