721374242 has 8 divisors (see below), whose sum is σ = 1083519936. Its totient is φ = 360200932.

The previous prime is 721374223. The next prime is 721374289. The reversal of 721374242 is 242473127.

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

It is a junction number, because it is equal to n+sod(n) for n = 721374199 and 721374208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241238 + ... + 244209.

It is an arithmetic number, because the mean of its divisors is an integer number (135439992).

Almost surely, 2^721374242 is an apocalyptic number.

721374242 is a deficient number, since it is larger than the sum of its proper divisors (362145694).

721374242 is a wasteful number, since it uses less digits than its factorization.

721374242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486192.

The product of its digits is 18816, while the sum is 32.

The square root of 721374242 is about 26858.4110103334. The cubic root of 721374242 is about 896.8508215863.

The spelling of 721374242 in words is "seven hundred twenty-one million, three hundred seventy-four thousand, two hundred forty-two".