12641863 has 8 divisors (see below), whose sum is σ = 14415408. Its totient is φ = 10982784.

The previous prime is 12641861. The next prime is 12641869. The reversal of 12641863 is 36814621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12641863 - 2¹ = 12641861 is a prime.

It is a super-2 number, since 2×12641863² = 319633400221538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641861) 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 7 ways as a sum of consecutive naturals, for example, 28381 + ... + 28822.

It is an arithmetic number, because the mean of its divisors is an integer number (1801926).

Almost surely, 2^12641863 is an apocalyptic number.

12641863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12641863 is a deficient number, since it is larger than the sum of its proper divisors (1773545).

12641863 is a wasteful number, since it uses less digits than its factorization.

12641863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57233.

The product of its digits is 6912, while the sum is 31.

The square root of 12641863 is about 3555.5397621177. The cubic root of 12641863 is about 232.9541007539.

The spelling of 12641863 in words is "twelve million, six hundred forty-one thousand, eight hundred sixty-three".