12134891 has 2 divisors, whose sum is σ = 12134892. Its totient is φ = 12134890.

The previous prime is 12134879. The next prime is 12134917. The reversal of 12134891 is 19843121.

It is a weak prime.

It is an emirp because it is prime and its reverse (19843121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12134891 - 2¹⁰ = 12133867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12134831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6067445 + 6067446.

It is an arithmetic number, because the mean of its divisors is an integer number (6067446).

Almost surely, 2^12134891 is an apocalyptic number.

12134891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12134891 is an equidigital number, since it uses as much as digits as its factorization.

12134891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 12134891 is about 3483.5170445973. The cubic root of 12134891 is about 229.7974966165.

The spelling of 12134891 in words is "twelve million, one hundred thirty-four thousand, eight hundred ninety-one".