12001187 has 4 divisors (see below), whose sum is σ = 13092216. Its totient is φ = 10910160.

The previous prime is 12001177. The next prime is 12001189. The reversal of 12001187 is 78110021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12001187 - 2⁸ = 12000931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545498 + ... + 545519.

It is an arithmetic number, because the mean of its divisors is an integer number (3273054).

Almost surely, 2^12001187 is an apocalyptic number.

12001187 is a deficient number, since it is larger than the sum of its proper divisors (1091029).

12001187 is a wasteful number, since it uses less digits than its factorization.

12001187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091028.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 12001187 is about 3464.2729395935. The cubic root of 12001187 is about 228.9503970163.

The spelling of 12001187 in words is "twelve million, one thousand, one hundred eighty-seven".