12148921 has 2 divisors, whose sum is σ = 12148922. Its totient is φ = 12148920.

The previous prime is 12148891. The next prime is 12148933. The reversal of 12148921 is 12984121.

12148921 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11148921 + 1000000 = 3339^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 12148921 - 2¹⁹ = 11624633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12148921.

It is not a weakly prime, because it can be changed into another prime (12148021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6074460 + 6074461.

It is an arithmetic number, because the mean of its divisors is an integer number (6074461).

Almost surely, 2^12148921 is an apocalyptic number.

It is an amenable number.

12148921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12148921 is an equidigital number, since it uses as much as digits as its factorization.

12148921 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 12148921 is about 3485.5302322602. The cubic root of 12148921 is about 229.8860241843.

The spelling of 12148921 in words is "twelve million, one hundred forty-eight thousand, nine hundred twenty-one".