12999000 has 128 divisors (see below), whose sum is σ = 46425600. Its totient is φ = 2966400.

The previous prime is 12998987. The next prime is 12999043. The reversal of 12999000 is 99921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20691 + ... + 21309.

It is an arithmetic number, because the mean of its divisors is an integer number (362700).

Almost surely, 2^12999000 is an apocalyptic number.

12999000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12999000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23212800).

12999000 is an abundant number, since it is smaller than the sum of its proper divisors (33426600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12999000 is a wasteful number, since it uses less digits than its factorization.

12999000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 636 counting only the distinct ones).

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

The square root of 12999000 is about 3605.4125977480. The cubic root of 12999000 is about 235.1274395542.

The spelling of 12999000 in words is "twelve million, nine hundred ninety-nine thousand".