12000001 has 12 divisors (see below), whose sum is σ = 13644372. Its totient is φ = 10489824.

The previous prime is 11999989. The next prime is 12000017. The reversal of 12000001 is 10000021.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 8673025 = 1824^2 + 2945^2 .

It is not a de Polignac number, because 12000001 - 2⁹ = 11999489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12000091) 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 in 11 ways as a sum of consecutive naturals, for example, 3415 + ... + 5971.

It is an arithmetic number, because the mean of its divisors is an integer number (1137031).

Almost surely, 2^12000001 is an apocalyptic number.

It is an amenable number.

12000001 is a deficient number, since it is larger than the sum of its proper divisors (1644371).

12000001 is a wasteful number, since it uses less digits than its factorization.

12000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608 (or 2589 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 12000001 is about 3464.1017594753. The cubic root of 12000001 is about 228.9428548702.

Adding to 12000001 its reverse (10000021), we get a palindrome (22000022).

Multiplying 12000001 by its reverse (10000021), we get a palindrome (120000262000021).

It can be divided in two parts, 1 and 2000001, that added together give a palindrome (2000002).

The spelling of 12000001 in words is "twelve million, one", and thus it is an aban number and an uban number.