12521256 has 64 divisors (see below), whose sum is σ = 34974720. Its totient is φ = 3702720.

The previous prime is 12521239. The next prime is 12521291. The reversal of 12521256 is 65212521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

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 in 15 ways as a sum of consecutive naturals, for example, 10801 + ... + 11903.

It is an arithmetic number, because the mean of its divisors is an integer number (546480).

Almost surely, 2^12521256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12521256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17487360).

12521256 is an abundant number, since it is smaller than the sum of its proper divisors (22453464).

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

12521256 is a wasteful number, since it uses less digits than its factorization.

12521256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166 (or 1162 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 12521256 is about 3538.5386814333. The cubic root of 12521256 is about 232.2109160020.

Adding to 12521256 its reverse (65212521), we get a palindrome (77733777).

The spelling of 12521256 in words is "twelve million, five hundred twenty-one thousand, two hundred fifty-six".