12520899 has 10 divisors (see below), whose sum is σ = 18704180. Its totient is φ = 8347212.

The previous prime is 12520889. The next prime is 12520903. The reversal of 12520899 is 99802521.

It is not a de Polignac number, because 12520899 - 2⁴ = 12520883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12520889) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 77209 + ... + 77370.

It is an arithmetic number, because the mean of its divisors is an integer number (1870418).

Almost surely, 2^12520899 is an apocalyptic number.

12520899 is a deficient number, since it is larger than the sum of its proper divisors (6183281).

12520899 is an equidigital number, since it uses as much as digits as its factorization.

12520899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154591 (or 154582 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 12520899 is about 3538.4882365214. The cubic root of 12520899 is about 232.2087090858.

The spelling of 12520899 in words is "twelve million, five hundred twenty thousand, eight hundred ninety-nine".