12581663 has 8 divisors (see below), whose sum is σ = 12790800. Its totient is φ = 12374208.

The previous prime is 12581659. The next prime is 12581689. The reversal of 12581663 is 36618521.

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 12581663 - 2² = 12581659 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 (12581603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33008 + ... + 33386.

It is an arithmetic number, because the mean of its divisors is an integer number (1598850).

Almost surely, 2^12581663 is an apocalyptic number.

12581663 is a deficient number, since it is larger than the sum of its proper divisors (209137).

12581663 is an equidigital number, since it uses as much as digits as its factorization.

12581663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its digits is 8640, while the sum is 32.

The square root of 12581663 is about 3547.0639971672. The cubic root of 12581663 is about 232.5837398284.

The spelling of 12581663 in words is "twelve million, five hundred eighty-one thousand, six hundred sixty-three".