12581667 has 48 divisors (see below), whose sum is σ = 22863360. Its totient is φ = 6500736.

The previous prime is 12581659. The next prime is 12581689. The reversal of 12581667 is 76618521.

12581667 is a `hidden beast` number, since 12 + 581 + 6 + 67 = 666.

It is not a de Polignac number, because 12581667 - 2³ = 12581659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12581627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27303 + ... + 27759.

It is an arithmetic number, because the mean of its divisors is an integer number (476320).

Almost surely, 2^12581667 is an apocalyptic number.

12581667 is a deficient number, since it is larger than the sum of its proper divisors (10281693).

12581667 is a wasteful number, since it uses less digits than its factorization.

12581667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 509 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 12581667 is about 3547.0645610138. The cubic root of 12581667 is about 232.5837644763.

The spelling of 12581667 in words is "twelve million, five hundred eighty-one thousand, six hundred sixty-seven".