721171472 has 40 divisors (see below), whose sum is σ = 1599855936. Its totient is φ = 308497536.

The previous prime is 721171457. The next prime is 721171483. The reversal of 721171472 is 274171127.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57338 + ... + 68774.

Almost surely, 2^721171472 is an apocalyptic number.

It is an amenable number.

721171472 is an abundant number, since it is smaller than the sum of its proper divisors (878684464).

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

721171472 is a wasteful number, since it uses less digits than its factorization.

721171472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12015 (or 12009 counting only the distinct ones).

The product of its digits is 5488, while the sum is 32.

The square root of 721171472 is about 26854.6359498691. The cubic root of 721171472 is about 896.7667822291.

The spelling of 721171472 in words is "seven hundred twenty-one million, one hundred seventy-one thousand, four hundred seventy-two".