721315274 has 8 divisors (see below), whose sum is σ = 1094130180. Its totient is φ = 356605216.

The previous prime is 721315237. The next prime is 721315279. The reversal of 721315274 is 472513127.

It can be written as a sum of positive squares in 2 ways, for example, as 719044225 + 2271049 = 26815^2 + 1507^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 721315274.

It is not an unprimeable number, because it can be changed into a prime (721315279) 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, 2025989 + ... + 2026344.

Almost surely, 2^721315274 is an apocalyptic number.

721315274 is a deficient number, since it is larger than the sum of its proper divisors (372814906).

721315274 is a wasteful number, since it uses less digits than its factorization.

721315274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052424.

The product of its digits is 11760, while the sum is 32.

The square root of 721315274 is about 26857.3132312225. The cubic root of 721315274 is about 896.8263835359.

The spelling of 721315274 in words is "seven hundred twenty-one million, three hundred fifteen thousand, two hundred seventy-four".