12971722 has 8 divisors (see below), whose sum is σ = 19630116. Its totient is φ = 6428352.

The previous prime is 12971683. The next prime is 12971743. The reversal of 12971722 is 22717921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8649481 + 4322241 = 2941^2 + 2079^2 .

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

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, 28473 + ... + 28924.

Almost surely, 2^12971722 is an apocalyptic number.

12971722 is a deficient number, since it is larger than the sum of its proper divisors (6658394).

12971722 is a wasteful number, since it uses less digits than its factorization.

12971722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57512.

The product of its digits is 3528, while the sum is 31.

The square root of 12971722 is about 3601.6276875879. The cubic root of 12971722 is about 234.9628551522.

The spelling of 12971722 in words is "twelve million, nine hundred seventy-one thousand, seven hundred twenty-two".