745304421 has 4 divisors (see below), whose sum is σ = 993739232. Its totient is φ = 496869612.

The previous prime is 745304419. The next prime is 745304459. The reversal of 745304421 is 124403547.

745304421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124403547 = 3 ⋅41467849.

It is not a de Polignac number, because 745304421 - 2¹ = 745304419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745304401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124217401 + ... + 124217406.

It is an arithmetic number, because the mean of its divisors is an integer number (248434808).

Almost surely, 2^745304421 is an apocalyptic number.

It is an amenable number.

745304421 is a deficient number, since it is larger than the sum of its proper divisors (248434811).

745304421 is a wasteful number, since it uses less digits than its factorization.

745304421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248434810.

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 745304421 is about 27300.2641196015. The cubic root of 745304421 is about 906.6602292982.

Adding to 745304421 its reverse (124403547), we get a palindrome (869707968).

The spelling of 745304421 in words is "seven hundred forty-five million, three hundred four thousand, four hundred twenty-one".