16045 has 4 divisors (see below), whose sum is σ = 19260. Its totient is φ = 12832.

The previous prime is 16033. The next prime is 16057. The reversal of 16045 is 54061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54061 = 7 ⋅7723.

It is an interprime number because it is at equal distance from previous prime (16033) and next prime (16057).

It can be written as a sum of positive squares in 2 ways, for example, as 7396 + 8649 = 86^2 + 93^2 .

It is a cyclic number.

It is not a de Polignac number, because 16045 - 2¹¹ = 13997 is a prime.

16045 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600 + ... + 1609.

It is an arithmetic number, because the mean of its divisors is an integer number (4815).

2¹⁶⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

16045 is a deficient number, since it is larger than the sum of its proper divisors (3215).

16045 is an equidigital number, since it uses as much as digits as its factorization.

16045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 16045 is about 126.6688596301. The cubic root of 16045 is about 25.2220224051. Note that the first 3 decimals are identical.

Adding to 16045 its sum of digits (16), we get a palindrome (16061).

The spelling of 16045 in words is "sixteen thousand, forty-five".