745765 has 4 divisors (see below), whose sum is σ = 894924. Its totient is φ = 596608.

The previous prime is 745757. The next prime is 745817. The reversal of 745765 is 567547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567547 = 97 ⋅5851.

It can be written as a sum of positive squares in 2 ways, for example, as 146689 + 599076 = 383^2 + 774^2 .

It is a cyclic number.

It is not a de Polignac number, because 745765 - 2³ = 745757 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 745765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74572 + ... + 74581.

It is an arithmetic number, because the mean of its divisors is an integer number (223731).

2⁷⁴⁵⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

745765 is a deficient number, since it is larger than the sum of its proper divisors (149159).

745765 is a wasteful number, since it uses less digits than its factorization.

745765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149158.

The product of its digits is 29400, while the sum is 34.

The square root of 745765 is about 863.5768639791. The cubic root of 745765 is about 90.6846955089.

The spelling of 745765 in words is "seven hundred forty-five thousand, seven hundred sixty-five".