23145 has 8 divisors (see below), whose sum is σ = 37056. Its totient is φ = 12336.

The previous prime is 23143. The next prime is 23159. The reversal of 23145 is 54132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23145 - 2¹ = 23143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1543 = 23145 / (2 + 3 + 1 + 4 + 5).

23145 is a lucky number.

It is a plaindrome in base 9 and base 12.

It is not an unprimeable number, because it can be changed into a prime (23143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757 + ... + 786.

It is an arithmetic number, because the mean of its divisors is an integer number (4632).

2²³¹⁴⁵ is an apocalyptic number.

It is an amenable number.

23145 is a deficient number, since it is larger than the sum of its proper divisors (13911).

23145 is a wasteful number, since it uses less digits than its factorization.

23145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551.

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

The square root of 23145 is about 152.1348086402. The cubic root of 23145 is about 28.4983070709.

Adding to 23145 its reverse (54132), we get a palindrome (77277).

It can be divided in two parts, 231 and 45, that added together give a triangular number (276 = T₂₃).

The spelling of 23145 in words is "twenty-three thousand, one hundred forty-five".