15849 has 8 divisors (see below), whose sum is σ = 23520. Its totient is φ = 10548.

The previous prime is 15823. The next prime is 15859. The reversal of 15849 is 94851.

It is not a de Polignac number, because 15849 - 2⁵ = 15817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 587 = 15849 / (1 + 5 + 8 + 4 + 9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15809) 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, 267 + ... + 320.

It is an arithmetic number, because the mean of its divisors is an integer number (2940).

2¹⁵⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

15849 is a deficient number, since it is larger than the sum of its proper divisors (7671).

15849 is an equidigital number, since it uses as much as digits as its factorization.

15849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 590 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 15849 is about 125.8928115501. The cubic root of 15849 is about 25.1189002791.

Adding to 15849 its sum of digits (27), we get a square (15876 = 126²).

The spelling of 15849 in words is "fifteen thousand, eight hundred forty-nine".