12400023 has 8 divisors (see below), whose sum is σ = 17103600. Its totient is φ = 7981568.

The previous prime is 12400009. The next prime is 12400043. The reversal of 12400023 is 32000421.

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

It is a cyclic number.

It is not a de Polignac number, because 12400023 - 2⁵ = 12399991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12399981 and 12400008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400043) 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, 71178 + ... + 71351.

It is an arithmetic number, because the mean of its divisors is an integer number (2137950).

Almost surely, 2^12400023 is an apocalyptic number.

12400023 is a deficient number, since it is larger than the sum of its proper divisors (4703577).

12400023 is a wasteful number, since it uses less digits than its factorization.

12400023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142561.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 12400023 is about 3521.3666381108. The cubic root of 12400023 is about 231.4590485588.

Adding to 12400023 its reverse (32000421), we get a palindrome (44400444).

The spelling of 12400023 in words is "twelve million, four hundred thousand, twenty-three".