12807755 has 4 divisors (see below), whose sum is σ = 15369312. Its totient is φ = 10246200.

The previous prime is 12807737. The next prime is 12807791. The reversal of 12807755 is 55770821.

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

It is a de Polignac number, because none of the positive numbers 2^k-12807755 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280771 + ... + 1280780.

It is an arithmetic number, because the mean of its divisors is an integer number (3842328).

Almost surely, 2^12807755 is an apocalyptic number.

12807755 is a deficient number, since it is larger than the sum of its proper divisors (2561557).

12807755 is an equidigital number, since it uses as much as digits as its factorization.

12807755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561556.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 12807755 is about 3578.7923940905. The cubic root of 12807755 is about 233.9686506813.

The spelling of 12807755 in words is "twelve million, eight hundred seven thousand, seven hundred fifty-five".