45023 has 4 divisors (see below), whose sum is σ = 49128. Its totient is φ = 40920.

The previous prime is 45013. The next prime is 45053. The reversal of 45023 is 32054.

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

It is not a de Polignac number, because 45023 - 2⁴ = 45007 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 44989 and 45007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036 + ... + 2057.

It is an arithmetic number, because the mean of its divisors is an integer number (12282).

2⁴⁵⁰²³ is an apocalyptic number.

45023 is a deficient number, since it is larger than the sum of its proper divisors (4105).

45023 is a wasteful number, since it uses less digits than its factorization.

45023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 45023 is about 212.1862389506. The cubic root of 45023 is about 35.5749919051.

Adding to 45023 its reverse (32054), we get a palindrome (77077).

The spelling of 45023 in words is "forty-five thousand, twenty-three".