45423 has 18 divisors (see below), whose sum is σ = 77064. Its totient is φ = 25704.

The previous prime is 45413. The next prime is 45427. The reversal of 45423 is 32454.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-45423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45396 and 45405.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 45423.

It is not an unprimeable number, because it can be changed into a prime (45427) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 390 + ... + 492.

2⁴⁵⁴²³ is an apocalyptic number.

45423 is a deficient number, since it is larger than the sum of its proper divisors (31641).

45423 is a wasteful number, since it uses less digits than its factorization.

45423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 113 counting only the distinct ones).

The product of its digits is 480, while the sum is 18.

The square root of 45423 is about 213.1267228669. The cubic root of 45423 is about 35.6800349729.

Adding to 45423 its reverse (32454), we get a palindrome (77877).

The spelling of 45423 in words is "forty-five thousand, four hundred twenty-three".