12621716 has 6 divisors (see below), whose sum is σ = 22088010. Its totient is φ = 6310856.

The previous prime is 12621703. The next prime is 12621731. The reversal of 12621716 is 61712621.

It can be written as a sum of positive squares in only one way, i.e., 10048900 + 2572816 = 3170^2 + 1604^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1577711 + ... + 1577718.

It is an arithmetic number, because the mean of its divisors is an integer number (3681335).

Almost surely, 2^12621716 is an apocalyptic number.

It is an amenable number.

12621716 is a deficient number, since it is larger than the sum of its proper divisors (9466294).

12621716 is a wasteful number, since it uses less digits than its factorization.

12621716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155433 (or 3155431 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 12621716 is about 3552.7054479650. The cubic root of 12621716 is about 232.8302840430.

The spelling of 12621716 in words is "twelve million, six hundred twenty-one thousand, seven hundred sixteen".