504632721 has 16 divisors (see below), whose sum is σ = 685185536. Its totient is φ = 330293376.

The previous prime is 504632699. The next prime is 504632729. The reversal of 504632721 is 127236405.

It is not a de Polignac number, because 504632721 - 2⁶ = 504632657 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (504632729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43671 + ... + 54003.

It is an arithmetic number, because the mean of its divisors is an integer number (42824096).

Almost surely, 2^504632721 is an apocalyptic number.

It is an amenable number.

504632721 is a deficient number, since it is larger than the sum of its proper divisors (180552815).

504632721 is a wasteful number, since it uses less digits than its factorization.

504632721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 504632721 is about 22464.0317173921. The cubic root of 504632721 is about 796.1443225641.

The spelling of 504632721 in words is "five hundred four million, six hundred thirty-two thousand, seven hundred twenty-one".