12520779 has 16 divisors (see below), whose sum is σ = 17521920. Its totient is φ = 7941920.

The previous prime is 12520777. The next prime is 12520793. The reversal of 12520779 is 97702521.

12520779 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12520779 - 2¹ = 12520777 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12520777) 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, 5164 + ... + 7190.

It is an arithmetic number, because the mean of its divisors is an integer number (1095120).

Almost surely, 2^12520779 is an apocalyptic number.

12520779 is a deficient number, since it is larger than the sum of its proper divisors (5001141).

12520779 is a wasteful number, since it uses less digits than its factorization.

12520779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 12520779 is about 3538.4712800869. The cubic root of 12520779 is about 232.2079672559.

The spelling of 12520779 in words is "twelve million, five hundred twenty thousand, seven hundred seventy-nine".