12002991 has 48 divisors (see below), whose sum is σ = 21909888. Its totient is φ = 5745600.

The previous prime is 12002989. The next prime is 12003007. The reversal of 12002991 is 19920021.

It is not a de Polignac number, because 12002991 - 2¹ = 12002989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20736 + ... + 21306.

It is an arithmetic number, because the mean of its divisors is an integer number (456456).

Almost surely, 2^12002991 is an apocalyptic number.

12002991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12002991 is a deficient number, since it is larger than the sum of its proper divisors (9906897).

12002991 is a wasteful number, since it uses less digits than its factorization.

12002991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 12002991 is about 3464.5333019037. The cubic root of 12002991 is about 228.9618682655.

The spelling of 12002991 in words is "twelve million, two thousand, nine hundred ninety-one".