721265752 has 8 divisors (see below), whose sum is σ = 1352373300. Its totient is φ = 360632872.

The previous prime is 721265729. The next prime is 721265761. The reversal of 721265752 is 257562127.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45079102 + ... + 45079117.

Almost surely, 2^721265752 is an apocalyptic number.

It is an amenable number.

721265752 is a deficient number, since it is larger than the sum of its proper divisors (631107548).

721265752 is a wasteful number, since it uses less digits than its factorization.

721265752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90158225 (or 90158221 counting only the distinct ones).

The product of its digits is 58800, while the sum is 37.

The square root of 721265752 is about 26856.3912691188. The cubic root of 721265752 is about 896.8058591530.

The spelling of 721265752 in words is "seven hundred twenty-one million, two hundred sixty-five thousand, seven hundred fifty-two".