12921723 has 12 divisors (see below), whose sum is σ = 18764928. Its totient is φ = 8568240.

The previous prime is 12921679. The next prime is 12921763. The reversal of 12921723 is 32712921.

12921723 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12921723 - 2¹² = 12917627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12921763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2040 + ... + 5477.

It is an arithmetic number, because the mean of its divisors is an integer number (1563744).

Almost surely, 2^12921723 is an apocalyptic number.

12921723 is a deficient number, since it is larger than the sum of its proper divisors (5843205).

12921723 is a wasteful number, since it uses less digits than its factorization.

12921723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7714 (or 7711 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12921723 is about 3594.6798188434. The cubic root of 12921723 is about 234.6605813766.

The spelling of 12921723 in words is "twelve million, nine hundred twenty-one thousand, seven hundred twenty-three".