12866955 has 16 divisors (see below), whose sum is σ = 21026304. Its totient is φ = 6716000.

The previous prime is 12866947. The next prime is 12866957. The reversal of 12866955 is 55966821.

It is not a de Polignac number, because 12866955 - 2³ = 12866947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12866957) 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, 8421 + ... + 9830.

It is an arithmetic number, because the mean of its divisors is an integer number (1314144).

Almost surely, 2^12866955 is an apocalyptic number.

12866955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12866955 is a deficient number, since it is larger than the sum of its proper divisors (8159349).

12866955 is a wasteful number, since it uses less digits than its factorization.

12866955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18306.

The product of its digits is 129600, while the sum is 42.

The square root of 12866955 is about 3587.0538050049. The cubic root of 12866955 is about 234.3285799623.

The spelling of 12866955 in words is "twelve million, eight hundred sixty-six thousand, nine hundred fifty-five".