721241634 has 16 divisors (see below), whose sum is σ = 1518403680. Its totient is φ = 227760480.

The previous prime is 721241627. The next prime is 721241681. The reversal of 721241634 is 436142127.

721241634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×721241634² = 1040378989229979912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3163227 + ... + 3163454.

It is an arithmetic number, because the mean of its divisors is an integer number (94900230).

Almost surely, 2^721241634 is an apocalyptic number.

721241634 is an abundant number, since it is smaller than the sum of its proper divisors (797162046).

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

721241634 is a wasteful number, since it uses less digits than its factorization.

721241634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6326705.

The product of its digits is 8064, while the sum is 30.

The square root of 721241634 is about 26855.9422474804. The cubic root of 721241634 is about 896.7958631126.

The spelling of 721241634 in words is "seven hundred twenty-one million, two hundred forty-one thousand, six hundred thirty-four".