12499520 has 112 divisors (see below), whose sum is σ = 33576768. Its totient is φ = 4392960.

The previous prime is 12499519. The next prime is 12499523. The reversal of 12499520 is 2599421.

12499520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (12499523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186527 + ... + 186593.

Almost surely, 2^12499520 is an apocalyptic number.

12499520 is a gapful number since it is divisible by the number (10) 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 12499520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16788384).

12499520 is an abundant number, since it is smaller than the sum of its proper divisors (21077248).

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

12499520 is a wasteful number, since it uses less digits than its factorization.

12499520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 12499520 is about 3535.4660230301. The cubic root of 12499520 is about 232.0764710258.

Subtracting from 12499520 its reverse (2599421), we obtain a palindrome (9900099).

The spelling of 12499520 in words is "twelve million, four hundred ninety-nine thousand, five hundred twenty".