12521124 has 72 divisors (see below), whose sum is σ = 39469248. Its totient is φ = 3251520.

The previous prime is 12521107. The next prime is 12521137. The reversal of 12521124 is 42112521.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12521097 and 12521106.

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 23 ways as a sum of consecutive naturals, for example, 514 + ... + 5030.

It is an arithmetic number, because the mean of its divisors is an integer number (548184).

Almost surely, 2^12521124 is an apocalyptic number.

12521124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12521124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19734624).

12521124 is an abundant number, since it is smaller than the sum of its proper divisors (26948124).

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

12521124 is a wasteful number, since it uses less digits than its factorization.

12521124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545 (or 4540 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 12521124 is about 3538.5200296169. The cubic root of 12521124 is about 232.2101000042.

Adding to 12521124 its reverse (42112521), we get a palindrome (54633645).

The spelling of 12521124 in words is "twelve million, five hundred twenty-one thousand, one hundred twenty-four".