12959999 has 16 divisors (see below), whose sum is σ = 14478240. Its totient is φ = 11525760.

The previous prime is 12959993. The next prime is 12960019. The reversal of 12959999 is 99995921.

It is a Cunningham number, because it is equal to 60⁴-1.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12959999 is a prime.

It is a Duffinian number.

12959999 is a modest number, since divided by 9999 gives 1295 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 12959999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12959993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46649 + ... + 46925.

It is an arithmetic number, because the mean of its divisors is an integer number (904890).

Almost surely, 2^12959999 is an apocalyptic number.

12959999 is a deficient number, since it is larger than the sum of its proper divisors (1518241).

12959999 is a wasteful number, since it uses less digits than its factorization.

12959999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410.

The product of its digits is 590490, while the sum is 53.

The square root of 12959999 is about 3599.9998611111. Note that the first 3 decimals coincide. The cubic root of 12959999 is about 234.8920524287.

The spelling of 12959999 in words is "twelve million, nine hundred fifty-nine thousand, nine hundred ninety-nine".