12816149 has 4 divisors (see below), whose sum is σ = 13128780. Its totient is φ = 12503520.

The previous prime is 12816143. The next prime is 12816163. The reversal of 12816149 is 94161821.

12816149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7022500 + 5793649 = 2650^2 + 2407^2 .

It is a cyclic number.

It is not a de Polignac number, because 12816149 - 2¹⁶ = 12750613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12816143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156254 + ... + 156335.

It is an arithmetic number, because the mean of its divisors is an integer number (3282195).

Almost surely, 2^12816149 is an apocalyptic number.

It is an amenable number.

12816149 is a deficient number, since it is larger than the sum of its proper divisors (312631).

12816149 is an equidigital number, since it uses as much as digits as its factorization.

12816149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312630.

The product of its digits is 3456, while the sum is 32.

The square root of 12816149 is about 3579.9649439624. The cubic root of 12816149 is about 234.0197526365.

The spelling of 12816149 in words is "twelve million, eight hundred sixteen thousand, one hundred forty-nine".