742447321 has 8 divisors (see below), whose sum is σ = 925648704. Its totient is φ = 578530320.

The previous prime is 742447313. The next prime is 742447333. The reversal of 742447321 is 123744247.

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

It is a cyclic number.

It is not a de Polignac number, because 742447321 - 2³ = 742447313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742447351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4821010 + ... + 4821163.

It is an arithmetic number, because the mean of its divisors is an integer number (115706088).

Almost surely, 2^742447321 is an apocalyptic number.

It is an amenable number.

742447321 is a deficient number, since it is larger than the sum of its proper divisors (183201383).

742447321 is a wasteful number, since it uses less digits than its factorization.

742447321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9642191.

The product of its digits is 37632, while the sum is 34.

The square root of 742447321 is about 27247.8865418953. The cubic root of 742447321 is about 905.5001949861.

It can be divided in two parts, 7424 and 47321, that added together give a palindrome (54745).

The spelling of 742447321 in words is "seven hundred forty-two million, four hundred forty-seven thousand, three hundred twenty-one".