745223 has 4 divisors (see below), whose sum is σ = 777648. Its totient is φ = 712800.

The previous prime is 745201. The next prime is 745231. The reversal of 745223 is 322547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322547 = 41 ⋅7867.

It is a cyclic number.

It is not a de Polignac number, because 745223 - 2¹⁰ = 744199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 32401 = 745223 / (7 + 4 + 5 + 2 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745243) 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, 16178 + ... + 16223.

It is an arithmetic number, because the mean of its divisors is an integer number (194412).

2⁷⁴⁵²²³ is an apocalyptic number.

745223 is a deficient number, since it is larger than the sum of its proper divisors (32425).

745223 is a wasteful number, since it uses less digits than its factorization.

745223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32424.

The product of its digits is 1680, while the sum is 23.

The square root of 745223 is about 863.2629958477. The cubic root of 745223 is about 90.6627211975.

It can be divided in two parts, 7452 and 23, that multiplied together give a square (171396 = 414²).

The spelling of 745223 in words is "seven hundred forty-five thousand, two hundred twenty-three".