16145 has 4 divisors (see below), whose sum is σ = 19380. Its totient is φ = 12912.

The previous prime is 16141. The next prime is 16183. The reversal of 16145 is 54161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54161 = 41 ⋅1321.

It can be written as a sum of positive squares in 2 ways, for example, as 5329 + 10816 = 73^2 + 104^2 .

It is a cyclic number.

It is not a de Polignac number, because 16145 - 2² = 16141 is a prime.

It is a super-2 number, since 2×16145² = 521322050, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (16141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610 + ... + 1619.

It is an arithmetic number, because the mean of its divisors is an integer number (4845).

2¹⁶¹⁴⁵ is an apocalyptic number.

It is an amenable number.

16145 is a deficient number, since it is larger than the sum of its proper divisors (3235).

16145 is an equidigital number, since it uses as much as digits as its factorization.

16145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234.

The product of its digits is 120, while the sum is 17.

The square root of 16145 is about 127.0629765116. The cubic root of 16145 is about 25.2743124322.

It can be divided in two parts, 16 and 145, that added together give a palindrome (161).

The spelling of 16145 in words is "sixteen thousand, one hundred forty-five".