721467642 has 32 divisors (see below), whose sum is σ = 1667606400. Its totient is φ = 203816448.

The previous prime is 721467613. The next prime is 721467653. The reversal of 721467642 is 246764127.

It is a self number, because there is not a number n which added to its sum of digits gives 721467642.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92767 + ... + 100242.

It is an arithmetic number, because the mean of its divisors is an integer number (52112700).

Almost surely, 2^721467642 is an apocalyptic number.

721467642 is an abundant number, since it is smaller than the sum of its proper divisors (946138758).

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

721467642 is a wasteful number, since it uses less digits than its factorization.

721467642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193110.

The product of its digits is 112896, while the sum is 39.

The square root of 721467642 is about 26860.1497017422. The cubic root of 721467642 is about 896.8895265317.

The spelling of 721467642 in words is "seven hundred twenty-one million, four hundred sixty-seven thousand, six hundred forty-two".