12987995 has 16 divisors (see below), whose sum is σ = 15966720. Its totient is φ = 10140000.

The previous prime is 12987973. The next prime is 12988007. The reversal of 12987995 is 59978921.

It is a happy number.

It is not a de Polignac number, because 12987995 - 2¹⁰ = 12986971 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51620 + ... + 51870.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^12987995 is an apocalyptic number.

12987995 is a deficient number, since it is larger than the sum of its proper divisors (2978725).

12987995 is a wasteful number, since it uses less digits than its factorization.

12987995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466.

The product of its digits is 408240, while the sum is 50.

The square root of 12987995 is about 3603.8860969792. The cubic root of 12987995 is about 235.0610675760.

The spelling of 12987995 in words is "twelve million, nine hundred eighty-seven thousand, nine hundred ninety-five".