12001071 has 4 divisors (see below), whose sum is σ = 16001432. Its totient is φ = 8000712.

The previous prime is 12001057. The next prime is 12001081. The reversal of 12001071 is 17010021.

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

It is not a de Polignac number, because 12001071 - 2⁹ = 12000559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001001) 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, 2000176 + ... + 2000181.

It is an arithmetic number, because the mean of its divisors is an integer number (4000358).

Almost surely, 2^12001071 is an apocalyptic number.

12001071 is a deficient number, since it is larger than the sum of its proper divisors (4000361).

12001071 is an equidigital number, since it uses as much as digits as its factorization.

12001071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000360.

The product of its (nonzero) digits is 14, while the sum is 12.

The square root of 12001071 is about 3464.2561972233. The cubic root of 12001071 is about 228.9496593578.

Adding to 12001071 its reverse (17010021), we get a palindrome (29011092).

The spelling of 12001071 in words is "twelve million, one thousand, seventy-one".