12134021 has 4 divisors (see below), whose sum is σ = 12259212. Its totient is φ = 12008832.

The previous prime is 12134011. The next prime is 12134029. The reversal of 12134021 is 12043121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12043121 = 523 ⋅23027.

It can be written as a sum of positive squares in 2 ways, for example, as 9541921 + 2592100 = 3089^2 + 1610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12134021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12133987 and 12134005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12134029) 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, 62450 + ... + 62643.

It is an arithmetic number, because the mean of its divisors is an integer number (3064803).

Almost surely, 2^12134021 is an apocalyptic number.

It is an amenable number.

12134021 is a deficient number, since it is larger than the sum of its proper divisors (125191).

12134021 is an equidigital number, since it uses as much as digits as its factorization.

12134021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125190.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 12134021 is about 3483.3921685621. The cubic root of 12134021 is about 229.7920047776.

Adding to 12134021 its reverse (12043121), we get a palindrome (24177142).

The spelling of 12134021 in words is "twelve million, one hundred thirty-four thousand, twenty-one".