12987867 has 8 divisors (see below), whose sum is σ = 17335296. Its totient is φ = 8649512.

The previous prime is 12987841. The next prime is 12987869. The reversal of 12987867 is 76878921.

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 12987867 - 2¹² = 12983771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12987869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2518 + ... + 5684.

It is an arithmetic number, because the mean of its divisors is an integer number (2166912).

Almost surely, 2^12987867 is an apocalyptic number.

12987867 is a deficient number, since it is larger than the sum of its proper divisors (4347429).

12987867 is a wasteful number, since it uses less digits than its factorization.

12987867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537.

The product of its digits is 338688, while the sum is 48.

The square root of 12987867 is about 3603.8683383276. The cubic root of 12987867 is about 235.0602953779.

The spelling of 12987867 in words is "twelve million, nine hundred eighty-seven thousand, eight hundred sixty-seven".