12722949 has 6 divisors (see below), whose sum is σ = 18377606. Its totient is φ = 8481960.

The previous prime is 12722923. The next prime is 12722959. The reversal of 12722949 is 94922721.

It can be written as a sum of positive squares in only one way, i.e., 7049025 + 5673924 = 2655^2 + 2382^2 .

It is not a de Polignac number, because 12722949 - 2⁵ = 12722917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12722959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 706822 + ... + 706839.

Almost surely, 2^12722949 is an apocalyptic number.

It is an amenable number.

12722949 is a deficient number, since it is larger than the sum of its proper divisors (5654657).

12722949 is a wasteful number, since it uses less digits than its factorization.

12722949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413667 (or 1413664 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 12722949 is about 3566.9243053365. The cubic root of 12722949 is about 233.4511022272.

The spelling of 12722949 in words is "twelve million, seven hundred twenty-two thousand, nine hundred forty-nine".