721081052 has 12 divisors (see below), whose sum is σ = 1262283456. Its totient is φ = 360428640.

The previous prime is 721081043. The next prime is 721081057. The reversal of 721081052 is 250180127.

It is a super-3 number, since 3×721081052³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721081057) 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, 12524 + ... + 39987.

It is an arithmetic number, because the mean of its divisors is an integer number (105190288).

Almost surely, 2^721081052 is an apocalyptic number.

It is an amenable number.

721081052 is a deficient number, since it is larger than the sum of its proper divisors (541202404).

721081052 is a wasteful number, since it uses less digits than its factorization.

721081052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55948 (or 55946 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 721081052 is about 26852.9523888901. The cubic root of 721081052 is about 896.7293019882.

The spelling of 721081052 in words is "seven hundred twenty-one million, eighty-one thousand, fifty-two".