12000891 has 8 divisors (see below), whose sum is σ = 18287104. Its totient is φ = 6857640.

The previous prime is 12000883. The next prime is 12000899. The reversal of 12000891 is 19800021.

It is an interprime number because it is at equal distance from previous prime (12000883) and next prime (12000899).

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

It is not a de Polignac number, because 12000891 - 2³ = 12000883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 571471 = 12000891 / (1 + 2 + 0 + 0 + 0 + 8 + 9 + 1).

It is a Duffinian number.

12000891 is a modest number, since divided by 891 gives 12 as remainder.

It is not an unprimeable number, because it can be changed into a prime (12000899) 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, 285715 + ... + 285756.

It is an arithmetic number, because the mean of its divisors is an integer number (2285888).

Almost surely, 2^12000891 is an apocalyptic number.

12000891 is a deficient number, since it is larger than the sum of its proper divisors (6286213).

12000891 is an equidigital number, since it uses as much as digits as its factorization.

12000891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571481.

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

The square root of 12000891 is about 3464.2302175231. The cubic root of 12000891 is about 228.9485147059.

The spelling of 12000891 in words is "twelve million, eight hundred ninety-one", and thus it is an aban number.