12620691 has 24 divisors (see below), whose sum is σ = 19079424. Its totient is φ = 8336520.

The previous prime is 12620687. The next prime is 12620701. The reversal of 12620691 is 19602621.

It is not a de Polignac number, because 12620691 - 2² = 12620687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12620611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40426 + ... + 40736.

It is an arithmetic number, because the mean of its divisors is an integer number (794976).

Almost surely, 2^12620691 is an apocalyptic number.

12620691 is a deficient number, since it is larger than the sum of its proper divisors (6458733).

12620691 is an equidigital number, since it uses as much as digits as its factorization.

12620691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12620691 is about 3552.5611887763. The cubic root of 12620691 is about 232.8239812154.

The spelling of 12620691 in words is "twelve million, six hundred twenty thousand, six hundred ninety-one".