12124891 has 2 divisors, whose sum is σ = 12124892. Its totient is φ = 12124890.

The previous prime is 12124867. The next prime is 12124897. The reversal of 12124891 is 19842121.

12124891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12124891 - 2¹¹ = 12122843 is a prime.

It is not a weakly prime, because it can be changed into another prime (12124897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6062445 + 6062446.

It is an arithmetic number, because the mean of its divisors is an integer number (6062446).

Almost surely, 2^12124891 is an apocalyptic number.

12124891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12124891 is an equidigital number, since it uses as much as digits as its factorization.

12124891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 28.

The square root of 12124891 is about 3482.0814177730. The cubic root of 12124891 is about 229.7343561926.

The spelling of 12124891 in words is "twelve million, one hundred twenty-four thousand, eight hundred ninety-one".