721614442 has 8 divisors (see below), whose sum is σ = 1082744100. Its totient is φ = 360699744.

The previous prime is 721614431. The next prime is 721614461. The reversal of 721614442 is 244416127.

721614442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 501715201 + 219899241 = 22399^2 + 14829^2 .

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

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, 45067 + ... + 58942.

Almost surely, 2^721614442 is an apocalyptic number.

721614442 is a deficient number, since it is larger than the sum of its proper divisors (361129658).

721614442 is a wasteful number, since it uses less digits than its factorization.

721614442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107480.

The product of its digits is 10752, while the sum is 31.

The square root of 721614442 is about 26862.8822355309. The cubic root of 721614442 is about 896.9503536780.

The spelling of 721614442 in words is "seven hundred twenty-one million, six hundred fourteen thousand, four hundred forty-two".