745128 has 48 divisors (see below), whose sum is σ = 2059200. Its totient is φ = 243360.

The previous prime is 745117. The next prime is 745133. The reversal of 745128 is 821547.

It is an unprimeable number.

745128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5623 + ... + 5753.

It is an arithmetic number, because the mean of its divisors is an integer number (42900).

2⁷⁴⁵¹²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029600).

745128 is an abundant number, since it is smaller than the sum of its proper divisors (1314072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

745128 is a wasteful number, since it uses less digits than its factorization.

745128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 215 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 745128 is about 863.2079703061. The cubic root of 745128 is about 90.6588685142.

The spelling of 745128 in words is "seven hundred forty-five thousand, one hundred twenty-eight".