12138001 has 2 divisors, whose sum is σ = 12138002. Its totient is φ = 12138000.

The previous prime is 12137989. The next prime is 12138023. The reversal of 12138001 is 10083121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10233601 + 1904400 = 3199^2 + 1380^2 .

It is a cyclic number.

It is not a de Polignac number, because 12138001 - 2⁵ = 12137969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12168001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6069000 + 6069001.

It is an arithmetic number, because the mean of its divisors is an integer number (6069001).

Almost surely, 2^12138001 is an apocalyptic number.

It is an amenable number.

12138001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12138001 is an equidigital number, since it uses as much as digits as its factorization.

12138001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 12138001 is about 3483.9634039410. The cubic root of 12138001 is about 229.8171262166.

The spelling of 12138001 in words is "twelve million, one hundred thirty-eight thousand, one".