742571221 has 16 divisors (see below), whose sum is σ = 860379520. Its totient is φ = 627756480.

The previous prime is 742571197. The next prime is 742571231. The reversal of 742571221 is 122175247.

742571221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742571221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742571231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150331 + ... + 155191.

It is an arithmetic number, because the mean of its divisors is an integer number (53773720).

Almost surely, 2^742571221 is an apocalyptic number.

It is an amenable number.

742571221 is a deficient number, since it is larger than the sum of its proper divisors (117808299).

742571221 is a wasteful number, since it uses less digits than its factorization.

742571221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164.

The product of its digits is 7840, while the sum is 31.

The square root of 742571221 is about 27250.1600178788. The cubic root of 742571221 is about 905.5505623009.

The spelling of 742571221 in words is "seven hundred forty-two million, five hundred seventy-one thousand, two hundred twenty-one".