745881 has 4 divisors (see below), whose sum is σ = 994512. Its totient is φ = 497252.

The previous prime is 745873. The next prime is 745903. The reversal of 745881 is 188547.

It is a happy number.

745881 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.

It is a cyclic number.

It is not a de Polignac number, because 745881 - 2³ = 745873 is a prime.

It is a super-2 number, since 2×745881² = 1112676932322, which contains 22 as substring.

It is a D-number.

745881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (745181) 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, 124311 + ... + 124316.

It is an arithmetic number, because the mean of its divisors is an integer number (248628).

2⁷⁴⁵⁸⁸¹ is an apocalyptic number.

It is an amenable number.

745881 is a deficient number, since it is larger than the sum of its proper divisors (248631).

745881 is a wasteful number, since it uses less digits than its factorization.

745881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248630.

The product of its digits is 8960, while the sum is 33.

The square root of 745881 is about 863.6440238895. The cubic root of 745881 is about 90.6893971147.

The spelling of 745881 in words is "seven hundred forty-five thousand, eight hundred eighty-one".