472057721 has 4 divisors (see below), whose sum is σ = 472220532. Its totient is φ = 471894912.

The previous prime is 472057687. The next prime is 472057753. The reversal of 472057721 is 127750274.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 286117225 + 185940496 = 16915^2 + 13636^2 .

It is a cyclic number.

It is not a de Polignac number, because 472057721 - 2⁶ = 472057657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (472050721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76976 + ... + 82881.

It is an arithmetic number, because the mean of its divisors is an integer number (118055133).

Almost surely, 2^472057721 is an apocalyptic number.

It is an amenable number.

472057721 is a deficient number, since it is larger than the sum of its proper divisors (162811).

472057721 is a wasteful number, since it uses less digits than its factorization.

472057721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162810.

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 472057721 is about 21726.8893539779. The cubic root of 472057721 is about 778.6310202491.

The spelling of 472057721 in words is "four hundred seventy-two million, fifty-seven thousand, seven hundred twenty-one".