12999 has 8 divisors (see below), whose sum is σ = 19840. Its totient is φ = 7416.

The previous prime is 12983. The next prime is 13001. The reversal of 12999 is 99921.

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

It is not a de Polignac number, because 12999 - 2⁴ = 12983 is a prime.

It is a Duffinian number.

12999 is a modest number, since divided by 999 gives 12 as remainder.

12999 is a lucky number.

It is a plaindrome in base 10 and base 13.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12919) 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, 289 + ... + 330.

It is an arithmetic number, because the mean of its divisors is an integer number (2480).

2¹²⁹⁹⁹ is an apocalyptic number.

12999 is a deficient number, since it is larger than the sum of its proper divisors (6841).

12999 is an equidigital number, since it uses as much as digits as its factorization.

12999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629.

The product of its digits is 1458, while the sum is 30.

The square root of 12999 is about 114.0131571355. The cubic root of 12999 is about 23.5127439554.

The spelling of 12999 in words is "twelve thousand, nine hundred ninety-nine".