710521721 has 32 divisors (see below), whose sum is σ = 908624640. Its totient is φ = 540400896.

The previous prime is 710521709. The next prime is 710521729. The reversal of 710521721 is 127125017.

It is not a de Polignac number, because 710521721 - 2¹⁰ = 710520697 is a prime.

It is a super-2 number, since 2×710521721² = 1009682232025603682, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (710521729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 809735 + ... + 810611.

It is an arithmetic number, because the mean of its divisors is an integer number (28394520).

Almost surely, 2^710521721 is an apocalyptic number.

It is an amenable number.

710521721 is a deficient number, since it is larger than the sum of its proper divisors (198102919).

710521721 is a wasteful number, since it uses less digits than its factorization.

710521721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233.

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 710521721 is about 26655.6133112709. The cubic root of 710521721 is about 892.3306003900.

Adding to 710521721 its reverse (127125017), we get a palindrome (837646738).

The spelling of 710521721 in words is "seven hundred ten million, five hundred twenty-one thousand, seven hundred twenty-one".