456736721 has 8 divisors (see below), whose sum is σ = 522621120. Its totient is φ = 391011408.

The previous prime is 456736717. The next prime is 456736723. The reversal of 456736721 is 127637654.

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

It is a cyclic number.

It is not a de Polignac number, because 456736721 - 2² = 456736717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (456736723) 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, 33551 + ... + 45156.

It is an arithmetic number, because the mean of its divisors is an integer number (65327640).

Almost surely, 2^456736721 is an apocalyptic number.

It is an amenable number.

456736721 is a deficient number, since it is larger than the sum of its proper divisors (65884399).

456736721 is an equidigital number, since it uses as much as digits as its factorization.

456736721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79543.

The product of its digits is 211680, while the sum is 41.

The square root of 456736721 is about 21371.3996032080. The cubic root of 456736721 is about 770.1145166161.

The spelling of 456736721 in words is "four hundred fifty-six million, seven hundred thirty-six thousand, seven hundred twenty-one".