12863551 has 4 divisors (see below), whose sum is σ = 13540600. Its totient is φ = 12186504.

The previous prime is 12863537. The next prime is 12863561. The reversal of 12863551 is 15536821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12863551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12863561) 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 3 ways as a sum of consecutive naturals, for example, 338496 + ... + 338533.

It is an arithmetic number, because the mean of its divisors is an integer number (3385150).

Almost surely, 2^12863551 is an apocalyptic number.

12863551 is a deficient number, since it is larger than the sum of its proper divisors (677049).

12863551 is an equidigital number, since it uses as much as digits as its factorization.

12863551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677048.

The product of its digits is 7200, while the sum is 31.

The square root of 12863551 is about 3586.5792895181. The cubic root of 12863551 is about 234.3079139788.

The spelling of 12863551 in words is "twelve million, eight hundred sixty-three thousand, five hundred fifty-one".