12861249 has 16 divisors (see below), whose sum is σ = 18138624. Its totient is φ = 8092800.

The previous prime is 12861241. The next prime is 12861259. The reversal of 12861249 is 94216821.

It is not a de Polignac number, because 12861249 - 2³ = 12861241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12861241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2127 + ... + 5499.

It is an arithmetic number, because the mean of its divisors is an integer number (1133664).

Almost surely, 2^12861249 is an apocalyptic number.

It is an amenable number.

12861249 is a deficient number, since it is larger than the sum of its proper divisors (5277375).

12861249 is a wasteful number, since it uses less digits than its factorization.

12861249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3448.

The product of its digits is 6912, while the sum is 33.

The square root of 12861249 is about 3586.2583565605. The cubic root of 12861249 is about 234.2939362678.

The spelling of 12861249 in words is "twelve million, eight hundred sixty-one thousand, two hundred forty-nine".