721514720 has 48 divisors (see below), whose sum is σ = 1746169488. Its totient is φ = 281564160.

The previous prime is 721514659. The next prime is 721514743. The reversal of 721514720 is 27415127.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48434 + ... + 61553.

It is an arithmetic number, because the mean of its divisors is an integer number (36378531).

Almost surely, 2^721514720 is an apocalyptic number.

It is an amenable number.

721514720 is an abundant number, since it is smaller than the sum of its proper divisors (1024654768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721514720 is a wasteful number, since it uses less digits than its factorization.

721514720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110043 (or 110035 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 721514720 is about 26861.0260414601. The cubic root of 721514720 is about 896.9090343813.

Adding to 721514720 its reverse (27415127), we get a palindrome (748929847).

The spelling of 721514720 in words is "seven hundred twenty-one million, five hundred fourteen thousand, seven hundred twenty".