12901999 has 8 divisors (see below), whose sum is σ = 14139648. Its totient is φ = 11675160.

The previous prime is 12901981. The next prime is 12902033. The reversal of 12901999 is 99910921.

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

It is a cyclic number.

It is not a de Polignac number, because 12901999 - 2⁷ = 12901871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12901979) 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, 87 + ... + 5080.

It is an arithmetic number, because the mean of its divisors is an integer number (1767456).

Almost surely, 2^12901999 is an apocalyptic number.

12901999 is a deficient number, since it is larger than the sum of its proper divisors (1237649).

12901999 is a wasteful number, since it uses less digits than its factorization.

12901999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5405.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 12901999 is about 3591.9352722453. The cubic root of 12901999 is about 234.5411235641.

The spelling of 12901999 in words is "twelve million, nine hundred one thousand, nine hundred ninety-nine".