12866449 has 4 divisors (see below), whose sum is σ = 12876580. Its totient is φ = 12856320.

The previous prime is 12866423. The next prime is 12866461. The reversal of 12866449 is 94466821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94466821 = 233 ⋅405437.

It can be written as a sum of positive squares in 2 ways, for example, as 1306449 + 11560000 = 1143^2 + 3400^2 .

It is a cyclic number.

It is not a de Polignac number, because 12866449 - 2¹³ = 12858257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12866149) 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, 2832 + ... + 5809.

It is an arithmetic number, because the mean of its divisors is an integer number (3219145).

Almost surely, 2^12866449 is an apocalyptic number.

It is an amenable number.

12866449 is a deficient number, since it is larger than the sum of its proper divisors (10131).

12866449 is an equidigital number, since it uses as much as digits as its factorization.

12866449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10130.

The product of its digits is 82944, while the sum is 40.

The square root of 12866449 is about 3586.9832728910. The cubic root of 12866449 is about 234.3255082224.

The spelling of 12866449 in words is "twelve million, eight hundred sixty-six thousand, four hundred forty-nine".