12855782 has 4 divisors (see below), whose sum is σ = 19283676. Its totient is φ = 6427890.

The previous prime is 12855767. The next prime is 12855797. The reversal of 12855782 is 28755821.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (12855767) and next prime (12855797).

It is a super-2 number, since 2×12855782² = 330542261663048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3213944 + ... + 3213947.

It is an arithmetic number, because the mean of its divisors is an integer number (4820919).

Almost surely, 2^12855782 is an apocalyptic number.

12855782 is a deficient number, since it is larger than the sum of its proper divisors (6427894).

12855782 is an equidigital number, since it uses as much as digits as its factorization.

12855782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6427893.

The product of its digits is 44800, while the sum is 38.

The square root of 12855782 is about 3585.4960605194. The cubic root of 12855782 is about 234.2607340367.

The spelling of 12855782 in words is "twelve million, eight hundred fifty-five thousand, seven hundred eighty-two".