12001023 has 12 divisors (see below), whose sum is σ = 17372368. Its totient is φ = 7983360.

The previous prime is 12001021. The next prime is 12001037. The reversal of 12001023 is 32010021.

It is a happy number.

12001023 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12001023 - 2¹ = 12001021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000996 and 12001014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4038 + ... + 6348.

Almost surely, 2^12001023 is an apocalyptic number.

12001023 is a deficient number, since it is larger than the sum of its proper divisors (5371345).

12001023 is a wasteful number, since it uses less digits than its factorization.

12001023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894 (or 2891 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 12001023 is about 3464.2492693223. The cubic root of 12001023 is about 228.9493541184.

Adding to 12001023 its reverse (32010021), we get a palindrome (44011044).

The spelling of 12001023 in words is "twelve million, one thousand, twenty-three".