12779625 has 32 divisors (see below), whose sum is σ = 21700224. Its totient is φ = 6676800.

The previous prime is 12779623. The next prime is 12779639. The reversal of 12779625 is 52697721.

It is not a de Polignac number, because 12779625 - 2¹ = 12779623 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12779621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19554 + ... + 20196.

It is an arithmetic number, because the mean of its divisors is an integer number (678132).

Almost surely, 2^12779625 is an apocalyptic number.

12779625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12779625 is a deficient number, since it is larger than the sum of its proper divisors (8920599).

12779625 is an equidigital number, since it uses as much as digits as its factorization.

12779625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 704 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 12779625 is about 3574.8601371242. The cubic root of 12779625 is about 233.7972346803.

The spelling of 12779625 in words is "twelve million, seven hundred seventy-nine thousand, six hundred twenty-five".