12400653 has 4 divisors (see below), whose sum is σ = 16534208. Its totient is φ = 8267100.

The previous prime is 12400643. The next prime is 12400669. The reversal of 12400653 is 35600421.

It is a happy number.

12400653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12400653 - 2⁸ = 12400397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400613) 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, 2066773 + ... + 2066778.

It is an arithmetic number, because the mean of its divisors is an integer number (4133552).

Almost surely, 2^12400653 is an apocalyptic number.

It is an amenable number.

12400653 is a deficient number, since it is larger than the sum of its proper divisors (4133555).

12400653 is an equidigital number, since it uses as much as digits as its factorization.

12400653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133554.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 12400653 is about 3521.4560908806. The cubic root of 12400653 is about 231.4629683561.

The spelling of 12400653 in words is "twelve million, four hundred thousand, six hundred fifty-three".