12955721 has 8 divisors (see below), whose sum is σ = 13478400. Its totient is φ = 12438160.

The previous prime is 12955711. The next prime is 12955727. The reversal of 12955721 is 12755921.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12955721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12955727) 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, 4370 + ... + 6708.

It is an arithmetic number, because the mean of its divisors is an integer number (1684800).

Almost surely, 2^12955721 is an apocalyptic number.

It is an amenable number.

12955721 is a deficient number, since it is larger than the sum of its proper divisors (522679).

12955721 is a wasteful number, since it uses less digits than its factorization.

12955721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559.

The product of its digits is 6300, while the sum is 32.

The square root of 12955721 is about 3599.4056453809. The cubic root of 12955721 is about 234.8662042068.

The spelling of 12955721 in words is "twelve million, nine hundred fifty-five thousand, seven hundred twenty-one".