12866842 has 4 divisors (see below), whose sum is σ = 19300266. Its totient is φ = 6433420.

The previous prime is 12866831. The next prime is 12866851. The reversal of 12866842 is 24866821.

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

It can be written as a sum of positive squares in only one way, i.e., 12595401 + 271441 = 3549^2 + 521^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3216709 + ... + 3216712.

Almost surely, 2^12866842 is an apocalyptic number.

12866842 is a deficient number, since it is larger than the sum of its proper divisors (6433424).

12866842 is an equidigital number, since it uses as much as digits as its factorization.

12866842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6433423.

The product of its digits is 36864, while the sum is 37.

The square root of 12866842 is about 3587.0380538823. The cubic root of 12866842 is about 234.3278939878.

It can be divided in two parts, 1286 and 6842, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 12866842 in words is "twelve million, eight hundred sixty-six thousand, eight hundred forty-two".