12721622 has 8 divisors (see below), whose sum is σ = 19912176. Its totient is φ = 6084232.

The previous prime is 12721609. The next prime is 12721651. The reversal of 12721622 is 22612721.

It is a happy number.

12721622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138233 + ... + 138324.

It is an arithmetic number, because the mean of its divisors is an integer number (2489022).

Almost surely, 2^12721622 is an apocalyptic number.

12721622 is a deficient number, since it is larger than the sum of its proper divisors (7190554).

12721622 is a wasteful number, since it uses less digits than its factorization.

12721622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276582.

The product of its digits is 672, while the sum is 23.

The square root of 12721622 is about 3566.7382858853. The cubic root of 12721622 is about 233.4429856503.

The spelling of 12721622 in words is "twelve million, seven hundred twenty-one thousand, six hundred twenty-two".