16149 has 8 divisors (see below), whose sum is σ = 24640. Its totient is φ = 9216.

The previous prime is 16141. The next prime is 16183. The reversal of 16149 is 94161.

16149 = 21² + 22² + ... + 38².

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

It is not a de Polignac number, because 16149 - 2³ = 16141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 769 = 16149 / (1 + 6 + 1 + 4 + 9).

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

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 16149.

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 7 ways as a sum of consecutive naturals, for example, 364 + ... + 405.

It is an arithmetic number, because the mean of its divisors is an integer number (3080).

2¹⁶¹⁴⁹ is an apocalyptic number.

It is an amenable number.

16149 is a deficient number, since it is larger than the sum of its proper divisors (8491).

16149 is an equidigital number, since it uses as much as digits as its factorization.

16149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779.

The product of its digits is 216, while the sum is 21.

The square root of 16149 is about 127.0787157631. The cubic root of 16149 is about 25.2763995366.

It can be divided in two parts, 161 and 49, that added together give a triangular number (210 = T₂₀).

The spelling of 16149 in words is "sixteen thousand, one hundred forty-nine".