15969 has 4 divisors (see below), whose sum is σ = 21296. Its totient is φ = 10644.

The previous prime is 15959. The next prime is 15971. The reversal of 15969 is 96951.

15969 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 15969 - 2⁵ = 15937 is a prime.

It is a super-2 number, since 2×15969² = 510017922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

15969 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (15919) 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, 2659 + ... + 2664.

It is an arithmetic number, because the mean of its divisors is an integer number (5324).

2¹⁵⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

15969 is a deficient number, since it is larger than the sum of its proper divisors (5327).

15969 is an equidigital number, since it uses as much as digits as its factorization.

15969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326.

The product of its digits is 2430, while the sum is 30.

The square root of 15969 is about 126.3685087354. The cubic root of 15969 is about 25.1821364961.

It can be divided in two parts, 15 and 969, that multiplied together give a triangular number (14535 = T₁₇₀).

The spelling of 15969 in words is "fifteen thousand, nine hundred sixty-nine".