745123 has 4 divisors (see below), whose sum is σ = 784360. Its totient is φ = 705888.

The previous prime is 745117. The next prime is 745133. The reversal of 745123 is 321547.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 745123 - 2¹⁷ = 614051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 745094 and 745103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745103) 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, 19590 + ... + 19627.

It is an arithmetic number, because the mean of its divisors is an integer number (196090).

2⁷⁴⁵¹²³ is an apocalyptic number.

745123 is a deficient number, since it is larger than the sum of its proper divisors (39237).

745123 is a wasteful number, since it uses less digits than its factorization.

745123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39236.

The product of its digits is 840, while the sum is 22.

The square root of 745123 is about 863.2050741278. The cubic root of 745123 is about 90.6586657324.

It can be divided in two parts, 745 and 123, that added together give a palindrome (868).

The spelling of 745123 in words is "seven hundred forty-five thousand, one hundred twenty-three".