721457474 has 16 divisors (see below), whose sum is σ = 1156149600. Its totient is φ = 336641184.

The previous prime is 721457459. The next prime is 721457501. The reversal of 721457474 is 474754127.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139139 + ... + 144230.

It is an arithmetic number, because the mean of its divisors is an integer number (72259350).

Almost surely, 2^721457474 is an apocalyptic number.

721457474 is a deficient number, since it is larger than the sum of its proper divisors (434692126).

721457474 is a wasteful number, since it uses less digits than its factorization.

721457474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283457.

The product of its digits is 219520, while the sum is 41.

The square root of 721457474 is about 26859.9604243938. The cubic root of 721457474 is about 896.8853130761.

The spelling of 721457474 in words is "seven hundred twenty-one million, four hundred fifty-seven thousand, four hundred seventy-four".