12420133 has 4 divisors (see below), whose sum is σ = 13549248. Its totient is φ = 11291020.

The previous prime is 12420131. The next prime is 12420137. The reversal of 12420133 is 33102421.

It is a happy number.

12420133 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 33102421 = 11 ⋅3009311.

It is a cyclic number.

It is not a de Polignac number, because 12420133 - 2¹ = 12420131 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 (12420131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564541 + ... + 564562.

It is an arithmetic number, because the mean of its divisors is an integer number (3387312).

Almost surely, 2^12420133 is an apocalyptic number.

It is an amenable number.

12420133 is a deficient number, since it is larger than the sum of its proper divisors (1129115).

12420133 is a wasteful number, since it uses less digits than its factorization.

12420133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129114.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 12420133 is about 3524.2209068105. The cubic root of 12420133 is about 231.5841055171.

Adding to 12420133 its reverse (33102421), we get a palindrome (45522554).

The spelling of 12420133 in words is "twelve million, four hundred twenty thousand, one hundred thirty-three".