721055342 has 8 divisors (see below), whose sum is σ = 1236094896. Its totient is φ = 309023712.

The previous prime is 721055317. The next prime is 721055353. The reversal of 721055342 is 243550127.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25751963 + ... + 25751990.

It is an arithmetic number, because the mean of its divisors is an integer number (154511862).

Almost surely, 2^721055342 is an apocalyptic number.

721055342 is a deficient number, since it is larger than the sum of its proper divisors (515039554).

721055342 is a wasteful number, since it uses less digits than its factorization.

721055342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51503962.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 721055342 is about 26852.4736663124. The cubic root of 721055342 is about 896.7186442939.

The spelling of 721055342 in words is "seven hundred twenty-one million, fifty-five thousand, three hundred forty-two".