720421474 has 8 divisors (see below), whose sum is σ = 1101021660. Its totient is φ = 353414256.

The previous prime is 720421469. The next prime is 720421489. The reversal of 720421474 is 474124027.

It can be written as a sum of positive squares in 2 ways, for example, as 573842025 + 146579449 = 23955^2 + 12107^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 3398109 + ... + 3398320.

Almost surely, 2^720421474 is an apocalyptic number.

720421474 is a deficient number, since it is larger than the sum of its proper divisors (380600186).

720421474 is a wasteful number, since it uses less digits than its factorization.

720421474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6796484.

The product of its (nonzero) digits is 12544, while the sum is 31.

The square root of 720421474 is about 26840.6682852719. The cubic root of 720421474 is about 896.4558036771.

The spelling of 720421474 in words is "seven hundred twenty million, four hundred twenty-one thousand, four hundred seventy-four".