12520780 has 24 divisors (see below), whose sum is σ = 26360208. Its totient is φ = 4995648.

The previous prime is 12520777. The next prime is 12520793. The reversal of 12520780 is 8702521.

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 7 ways as a sum of consecutive naturals, for example, 14727 + ... + 15553.

It is an arithmetic number, because the mean of its divisors is an integer number (1098342).

Almost surely, 2^12520780 is an apocalyptic number.

12520780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12520780 is an abundant number, since it is smaller than the sum of its proper divisors (13839428).

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

12520780 is a wasteful number, since it uses less digits than its factorization.

12520780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 12520780 is about 3538.4714213909. The cubic root of 12520780 is about 232.2079734378.

The spelling of 12520780 in words is "twelve million, five hundred twenty thousand, seven hundred eighty".