11999001 has 8 divisors (see below), whose sum is σ = 18284224. Its totient is φ = 6856560.

The previous prime is 11998979. The next prime is 11999027. The reversal of 11999001 is 10099911.

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

It is not a de Polignac number, because 11999001 - 2¹⁰ = 11997977 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11999001.

It is not an unprimeable number, because it can be changed into a prime (11994001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285670 + ... + 285711.

It is an arithmetic number, because the mean of its divisors is an integer number (2285528).

Almost surely, 2^11999001 is an apocalyptic number.

It is an amenable number.

11999001 is a deficient number, since it is larger than the sum of its proper divisors (6285223).

11999001 is an equidigital number, since it uses as much as digits as its factorization.

11999001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571391.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 11999001 is about 3463.9574189069. The cubic root of 11999001 is about 228.9364951703.

The spelling of 11999001 in words is "eleven million, nine hundred ninety-nine thousand, one".