12840999 has 8 divisors (see below), whose sum is σ = 17444592. Its totient is φ = 8399040.

The previous prime is 12840953. The next prime is 12841007. The reversal of 12840999 is 99904821.

12840999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12840999 - 2⁷ = 12840871 is a prime.

It is a super-3 number, since 3×12840999³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12840999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840299) 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, 40222 + ... + 40539.

It is an arithmetic number, because the mean of its divisors is an integer number (2180574).

Almost surely, 2^12840999 is an apocalyptic number.

12840999 is a deficient number, since it is larger than the sum of its proper divisors (4603593).

12840999 is an equidigital number, since it uses as much as digits as its factorization.

12840999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80817.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 12840999 is about 3583.4339675791. The cubic root of 12840999 is about 234.1709066296.

The spelling of 12840999 in words is "twelve million, eight hundred forty thousand, nine hundred ninety-nine".