12188001 has 8 divisors (see below), whose sum is σ = 18572224. Its totient is φ = 6964560.

The previous prime is 12187951. The next prime is 12188003. The reversal of 12188001 is 10088121.

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

It is not a de Polignac number, because 12188001 - 2⁹ = 12187489 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: 580381 = 12188001 / (1 + 2 + 1 + 8 + 8 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12188003) 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, 290170 + ... + 290211.

It is an arithmetic number, because the mean of its divisors is an integer number (2321528).

Almost surely, 2^12188001 is an apocalyptic number.

It is an amenable number.

12188001 is a deficient number, since it is larger than the sum of its proper divisors (6384223).

12188001 is an equidigital number, since it uses as much as digits as its factorization.

12188001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580391.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 12188001 is about 3491.1317649152. The cubic root of 12188001 is about 230.1322553785.

The spelling of 12188001 in words is "twelve million, one hundred eighty-eight thousand, one".