12871778 has 8 divisors (see below), whose sum is σ = 20323920. Its totient is φ = 6097140.

The previous prime is 12871777. The next prime is 12871787. The reversal of 12871778 is 87717821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12871777) 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, 169328 + ... + 169403.

It is an arithmetic number, because the mean of its divisors is an integer number (2540490).

Almost surely, 2^12871778 is an apocalyptic number.

12871778 is a deficient number, since it is larger than the sum of its proper divisors (7452142).

12871778 is a wasteful number, since it uses less digits than its factorization.

12871778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338752.

The product of its digits is 43904, while the sum is 41.

The square root of 12871778 is about 3587.7260207547. The cubic root of 12871778 is about 234.3578545799.

The spelling of 12871778 in words is "twelve million, eight hundred seventy-one thousand, seven hundred seventy-eight".