12148891 has 2 divisors, whose sum is σ = 12148892. Its totient is φ = 12148890.

The previous prime is 12148861. The next prime is 12148921. The reversal of 12148891 is 19884121.

12148891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12148861) and next prime (12148921).

It is a cyclic number.

It is not a de Polignac number, because 12148891 - 2¹¹ = 12146843 is a prime.

It is not a weakly prime, because it can be changed into another prime (12148811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6074445 + 6074446.

It is an arithmetic number, because the mean of its divisors is an integer number (6074446).

Almost surely, 2^12148891 is an apocalyptic number.

12148891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12148891 is an equidigital number, since it uses as much as digits as its factorization.

12148891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 34.

The square root of 12148891 is about 3485.5259287516. The cubic root of 12148891 is about 229.8858349607.

The spelling of 12148891 in words is "twelve million, one hundred forty-eight thousand, eight hundred ninety-one".