12581863 has 16 divisors (see below), whose sum is σ = 14775040. Its totient is φ = 10492416.

The previous prime is 12581837. The next prime is 12581879. The reversal of 12581863 is 36818521.

It is a cyclic number.

It is not a de Polignac number, because 12581863 - 2¹⁷ = 12450791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65095 + ... + 65287.

It is an arithmetic number, because the mean of its divisors is an integer number (923440).

Almost surely, 2^12581863 is an apocalyptic number.

12581863 is a deficient number, since it is larger than the sum of its proper divisors (2193177).

12581863 is a wasteful number, since it uses less digits than its factorization.

12581863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406.

The product of its digits is 11520, while the sum is 34.

The square root of 12581863 is about 3547.0921893856. The cubic root of 12581863 is about 232.5849722172.

The spelling of 12581863 in words is "twelve million, five hundred eighty-one thousand, eight hundred sixty-three".