52710721 has 6 divisors (see below), whose sum is σ = 61316610. Its totient is φ = 45180576.

The previous prime is 52710703. The next prime is 52710737. The reversal of 52710721 is 12701725.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37344321 + 15366400 = 6111^2 + 3920^2 .

It is not a de Polignac number, because 52710721 - 2⁹ = 52710209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52710701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 537816 + ... + 537913.

It is an arithmetic number, because the mean of its divisors is an integer number (10219435).

Almost surely, 2^52710721 is an apocalyptic number.

It is an amenable number.

52710721 is a deficient number, since it is larger than the sum of its proper divisors (8605889).

52710721 is a wasteful number, since it uses less digits than its factorization.

52710721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075743 (or 1075736 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 52710721 is about 7260.2149417218. The cubic root of 52710721 is about 374.9439228740.

The spelling of 52710721 in words is "fifty-two million, seven hundred ten thousand, seven hundred twenty-one".