745597 has 4 divisors (see below), whose sum is σ = 747616. Its totient is φ = 743580.

The previous prime is 745573. The next prime is 745601. The reversal of 745597 is 795547.

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, and also an emirpimes, since its reverse is a distinct semiprime: 795547 = 23 ⋅34589.

It is a cyclic number.

It is not a de Polignac number, because 745597 - 2¹¹ = 743549 is a prime.

It is a Duffinian number.

745597 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745517) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 279 + ... + 1252.

It is an arithmetic number, because the mean of its divisors is an integer number (186904).

2⁷⁴⁵⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

745597 is a deficient number, since it is larger than the sum of its proper divisors (2019).

745597 is a wasteful number, since it uses less digits than its factorization.

745597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018.

The product of its digits is 44100, while the sum is 37.

The square root of 745597 is about 863.4795886412. The cubic root of 745597 is about 90.6778854221.

It can be divided in two parts, 74 and 5597, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 745597 in words is "seven hundred forty-five thousand, five hundred ninety-seven".