12621715 has 4 divisors (see below), whose sum is σ = 15146064. Its totient is φ = 10097368.

The previous prime is 12621703. The next prime is 12621731. The reversal of 12621715 is 51712621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51712621 = 617 ⋅83813.

It is a cyclic number.

It is not a de Polignac number, because 12621715 - 2¹⁹ = 12097427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12621715.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262167 + ... + 1262176.

It is an arithmetic number, because the mean of its divisors is an integer number (3786516).

Almost surely, 2^12621715 is an apocalyptic number.

12621715 is a deficient number, since it is larger than the sum of its proper divisors (2524349).

12621715 is an equidigital number, since it uses as much as digits as its factorization.

12621715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524348.

The product of its digits is 840, while the sum is 25.

The square root of 12621715 is about 3552.7053072272. The cubic root of 12621715 is about 232.8302778941.

The spelling of 12621715 in words is "twelve million, six hundred twenty-one thousand, seven hundred fifteen".