12722643 has 8 divisors (see below), whose sum is σ = 18848400. Its totient is φ = 8481744.

The previous prime is 12722641. The next prime is 12722653. The reversal of 12722643 is 34622721.

12722643 is a `hidden beast` number, since 12 + 7 + 2 + 2 + 643 = 666.

12722643 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 12722643 - 2¹ = 12722641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 471209 = 12722643 / (1 + 2 + 7 + 2 + 2 + 6 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (12722641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235578 + ... + 235631.

It is an arithmetic number, because the mean of its divisors is an integer number (2356050).

Almost surely, 2^12722643 is an apocalyptic number.

12722643 is a deficient number, since it is larger than the sum of its proper divisors (6125757).

12722643 is an equidigital number, since it uses as much as digits as its factorization.

12722643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471218 (or 471212 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 12722643 is about 3566.8814109807. The cubic root of 12722643 is about 233.4492306326.

The spelling of 12722643 in words is "twelve million, seven hundred twenty-two thousand, six hundred forty-three".