745891 has 4 divisors (see below), whose sum is σ = 769984. Its totient is φ = 721800.

The previous prime is 745873. The next prime is 745903. The reversal of 745891 is 198547.

It is a happy number.

745891 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 an emirpimes, since its reverse is a distinct semiprime: 198547 = 367 ⋅541.

It is a cyclic number.

It is not a de Polignac number, because 745891 - 2⁵ = 745859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745391) 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, 12000 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (192496).

2⁷⁴⁵⁸⁹¹ is an apocalyptic number.

745891 is a deficient number, since it is larger than the sum of its proper divisors (24093).

745891 is a wasteful number, since it uses less digits than its factorization.

745891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24092.

The product of its digits is 10080, while the sum is 34.

The square root of 745891 is about 863.6498132924. The cubic root of 745891 is about 90.6898024028.

The spelling of 745891 in words is "seven hundred forty-five thousand, eight hundred ninety-one".