12620791 has 4 divisors (see below), whose sum is σ = 12641800. Its totient is φ = 12599784.

The previous prime is 12620789. The next prime is 12620827. The reversal of 12620791 is 19702621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12620791 - 2¹ = 12620789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12620701) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9576 + ... + 10813.

It is an arithmetic number, because the mean of its divisors is an integer number (3160450).

Almost surely, 2^12620791 is an apocalyptic number.

12620791 is a deficient number, since it is larger than the sum of its proper divisors (21009).

12620791 is an equidigital number, since it uses as much as digits as its factorization.

12620791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21008.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 12620791 is about 3552.5752631014. The cubic root of 12620791 is about 232.8245961404.

The spelling of 12620791 in words is "twelve million, six hundred twenty thousand, seven hundred ninety-one".