12640133 has 16 divisors (see below), whose sum is σ = 14708736. Its totient is φ = 10747440.

The previous prime is 12640123. The next prime is 12640141. The reversal of 12640133 is 33104621.

12640133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12640133 - 2¹² = 12636037 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 (12640123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11360 + ... + 12422.

It is an arithmetic number, because the mean of its divisors is an integer number (919296).

Almost surely, 2^12640133 is an apocalyptic number.

It is an amenable number.

12640133 is a deficient number, since it is larger than the sum of its proper divisors (2068603).

12640133 is a wasteful number, since it uses less digits than its factorization.

12640133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 12640133 is about 3555.2964714634. The cubic root of 12640133 is about 232.9434739188.

Adding to 12640133 its reverse (33104621), we get a palindrome (45744754).

The spelling of 12640133 in words is "twelve million, six hundred forty thousand, one hundred thirty-three".