16445 has 16 divisors (see below), whose sum is σ = 24192. Its totient is φ = 10560.

The previous prime is 16433. The next prime is 16447. The reversal of 16445 is 54461.

It is a happy number.

16445 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16445 - 2⁶ = 16381 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 704 + ... + 726.

It is an arithmetic number, because the mean of its divisors is an integer number (1512).

2¹⁶⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

16445 is a deficient number, since it is larger than the sum of its proper divisors (7747).

16445 is a wasteful number, since it uses less digits than its factorization.

16445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52.

The product of its digits is 480, while the sum is 20.

The square root of 16445 is about 128.2380598730. The cubic root of 16445 is about 25.4298984525.

It can be divided in two parts, 1 and 6445, that added together give a palindrome (6446).

The spelling of 16445 in words is "sixteen thousand, four hundred forty-five".