45123 has 12 divisors (see below), whose sum is σ = 65880. Its totient is φ = 27456.

The previous prime is 45121. The next prime is 45127. The reversal of 45123 is 32154.

It is not a de Polignac number, because 45123 - 2¹ = 45121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 463 + ... + 551.

It is an arithmetic number, because the mean of its divisors is an integer number (5490).

2⁴⁵¹²³ is an apocalyptic number.

45123 is a deficient number, since it is larger than the sum of its proper divisors (20757).

45123 is a wasteful number, since it uses less digits than its factorization.

45123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 105 counting only the distinct ones).

The product of its digits is 120, while the sum is 15.

The square root of 45123 is about 212.4217502988. The cubic root of 45123 is about 35.6013108132.

Adding to 45123 its reverse (32154), we get a palindrome (77277).

It can be divided in two parts, 451 and 23, that added together give a palindrome (474).

The spelling of 45123 in words is "forty-five thousand, one hundred twenty-three".