745805 has 4 divisors (see below), whose sum is σ = 894972. Its totient is φ = 596640.

The previous prime is 745757. The next prime is 745817. The reversal of 745805 is 508547.

745805 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: 508547 = 13 ⋅39119.

It can be written as a sum of positive squares in 2 ways, for example, as 477481 + 268324 = 691^2 + 518^2 .

It is not a de Polignac number, because 745805 - 2⁶ = 745741 is a prime.

It is a Duffinian number.

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, 74576 + ... + 74585.

It is an arithmetic number, because the mean of its divisors is an integer number (223743).

2⁷⁴⁵⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

745805 is a deficient number, since it is larger than the sum of its proper divisors (149167).

745805 is a wasteful number, since it uses less digits than its factorization.

745805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149166.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 745805 is about 863.6000231589. The cubic root of 745805 is about 90.6863168073.

The spelling of 745805 in words is "seven hundred forty-five thousand, eight hundred five".