12001089 has 8 divisors (see below), whose sum is σ = 16023520. Its totient is φ = 7989696.

The previous prime is 12001081. The next prime is 12001091. The reversal of 12001089 is 98010021.

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

It is not a de Polignac number, because 12001089 - 2³ = 12001081 is a prime.

It is a super-2 number, since 2×12001089² = 288052274371842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001081) 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, 249 + ... + 4905.

It is an arithmetic number, because the mean of its divisors is an integer number (2002940).

Almost surely, 2^12001089 is an apocalyptic number.

It is an amenable number.

12001089 is a deficient number, since it is larger than the sum of its proper divisors (4022431).

12001089 is an equidigital number, since it uses as much as digits as its factorization.

12001089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5519.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 12001089 is about 3464.2587951826. The cubic root of 12001089 is about 228.9497738223.

The spelling of 12001089 in words is "twelve million, one thousand, eighty-nine".