745505421 has 8 divisors (see below), whose sum is σ = 995136480. Its totient is φ = 496438992.

The previous prime is 745505401. The next prime is 745505429. The reversal of 745505421 is 124505547.

745505421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 745505421 - 2⁶ = 745505357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745505429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138066 + ... + 143363.

It is an arithmetic number, because the mean of its divisors is an integer number (124392060).

Almost surely, 2^745505421 is an apocalyptic number.

It is an amenable number.

745505421 is a deficient number, since it is larger than the sum of its proper divisors (249631059).

745505421 is a wasteful number, since it uses less digits than its factorization.

745505421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282315.

The product of its (nonzero) digits is 28000, while the sum is 33.

The square root of 745505421 is about 27303.9451545010. The cubic root of 745505421 is about 906.7417272386.

The spelling of 745505421 in words is "seven hundred forty-five million, five hundred five thousand, four hundred twenty-one".