12400133 has 4 divisors (see below), whose sum is σ = 12413388. Its totient is φ = 12386880.

The previous prime is 12400127. The next prime is 12400169. The reversal of 12400133 is 33100421.

12400133 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.

It can be written as a sum of positive squares in 2 ways, for example, as 996004 + 11404129 = 998^2 + 3377^2 .

It is a cyclic number.

It is not a de Polignac number, because 12400133 - 2¹⁰ = 12399109 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 (12400183) 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, 5108 + ... + 7133.

It is an arithmetic number, because the mean of its divisors is an integer number (3103347).

Almost surely, 2^12400133 is an apocalyptic number.

It is an amenable number.

12400133 is a deficient number, since it is larger than the sum of its proper divisors (13255).

12400133 is a wasteful number, since it uses less digits than its factorization.

12400133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13254.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 12400133 is about 3521.3822570122. The cubic root of 12400133 is about 231.4597329774.

Adding to 12400133 its reverse (33100421), we get a palindrome (45500554).

The spelling of 12400133 in words is "twelve million, four hundred thousand, one hundred thirty-three".