23445 has 12 divisors (see below), whose sum is σ = 40716. Its totient is φ = 12480.

The previous prime is 23431. The next prime is 23447. The reversal of 23445 is 54432.

It is a happy number.

23445 is an esthetic number in base 14, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 7569 + 15876 = 87^2 + 126^2 .

It is not a de Polignac number, because 23445 - 2⁸ = 23189 is a prime.

23445 is a lucky number.

It is a plaindrome in base 10 and base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23447) 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, 216 + ... + 305.

It is an arithmetic number, because the mean of its divisors is an integer number (3393).

2²³⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

23445 is a deficient number, since it is larger than the sum of its proper divisors (17271).

23445 is a wasteful number, since it uses less digits than its factorization.

23445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 529 counting only the distinct ones).

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

The square root of 23445 is about 153.1176018621. The cubic root of 23445 is about 28.6209083096.

Adding to 23445 its reverse (54432), we get a palindrome (77877).

The spelling of 23445 in words is "twenty-three thousand, four hundred forty-five".