745489251 has 48 divisors (see below), whose sum is σ = 1211284320. Its totient is φ = 458535168.

The previous prime is 745489247. The next prime is 745489289. The reversal of 745489251 is 152984547.

It is not a de Polignac number, because 745489251 - 2² = 745489247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 745489197 and 745489206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745489211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 368595 + ... + 370611.

It is an arithmetic number, because the mean of its divisors is an integer number (25235090).

Almost surely, 2^745489251 is an apocalyptic number.

745489251 is a deficient number, since it is larger than the sum of its proper divisors (465795069).

745489251 is an equidigital number, since it uses as much as digits as its factorization.

745489251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064 (or 2033 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 745489251 is about 27303.6490418405. The cubic root of 745489251 is about 906.7351714537.

The spelling of 745489251 in words is "seven hundred forty-five million, four hundred eighty-nine thousand, two hundred fifty-one".