745437321 has 12 divisors (see below), whose sum is σ = 1083875520. Its totient is φ = 493666200.

The previous prime is 745437313. The next prime is 745437331. The reversal of 745437321 is 123734547.

745437321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 745437321 - 2³ = 745437313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (745437311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272901 + ... + 275618.

It is an arithmetic number, because the mean of its divisors is an integer number (90322960).

Almost surely, 2^745437321 is an apocalyptic number.

It is an amenable number.

745437321 is a deficient number, since it is larger than the sum of its proper divisors (338438199).

745437321 is a wasteful number, since it uses less digits than its factorization.

745437321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548676 (or 548673 counting only the distinct ones).

The product of its digits is 70560, while the sum is 36.

The square root of 745437321 is about 27302.6980534891. The cubic root of 745437321 is about 906.7141168908.

The spelling of 745437321 in words is "seven hundred forty-five million, four hundred thirty-seven thousand, three hundred twenty-one".