12621959 has 6 divisors (see below), whose sum is σ = 14682744. Its totient is φ = 10818780.

The previous prime is 12621949. The next prime is 12621967. The reversal of 12621959 is 95912621.

It is not a de Polignac number, because 12621959 - 2⁸ = 12621703 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 (12621949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128747 + ... + 128844.

It is an arithmetic number, because the mean of its divisors is an integer number (2447124).

Almost surely, 2^12621959 is an apocalyptic number.

12621959 is a deficient number, since it is larger than the sum of its proper divisors (2060785).

12621959 is an equidigital number, since it uses as much as digits as its factorization.

12621959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257605 (or 257598 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 12621959 is about 3552.7396470893. The cubic root of 12621959 is about 232.8317782243.

The spelling of 12621959 in words is "twelve million, six hundred twenty-one thousand, nine hundred fifty-nine".