455672721 has 32 divisors (see below), whose sum is σ = 704471040. Its totient is φ = 256618944.

The previous prime is 455672713. The next prime is 455672759. The reversal of 455672721 is 127276554.

It is not a de Polignac number, because 455672721 - 2³ = 455672713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 455672721.

It is not an unprimeable number, because it can be changed into a prime (455672761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 633400 + ... + 634118.

It is an arithmetic number, because the mean of its divisors is an integer number (22014720).

Almost surely, 2^455672721 is an apocalyptic number.

It is an amenable number.

455672721 is a deficient number, since it is larger than the sum of its proper divisors (248798319).

455672721 is a wasteful number, since it uses less digits than its factorization.

455672721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125.

The product of its digits is 117600, while the sum is 39.

The square root of 455672721 is about 21346.4920068849. The cubic root of 455672721 is about 769.5160398443.

It can be divided in two parts, 4556 and 72721, that added together give a palindrome (77277).

The spelling of 455672721 in words is "four hundred fifty-five million, six hundred seventy-two thousand, seven hundred twenty-one".