12704987 has 6 divisors (see below), whose sum is σ = 13159068. Its totient is φ = 12266072.

The previous prime is 12704981. The next prime is 12704999. The reversal of 12704987 is 78940721.

It is not a de Polignac number, because 12704987 - 2⁴ = 12704971 is a prime.

It is a super-2 number, since 2×12704987² = 322833389340338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12704987.

It is not an unprimeable number, because it can be changed into a prime (12704981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6713 + ... + 8394.

It is an arithmetic number, because the mean of its divisors is an integer number (2193178).

Almost surely, 2^12704987 is an apocalyptic number.

12704987 is a deficient number, since it is larger than the sum of its proper divisors (454081).

12704987 is an equidigital number, since it uses as much as digits as its factorization.

12704987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15165 (or 15136 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 12704987 is about 3564.4055605388. The cubic root of 12704987 is about 233.3411899849.

The spelling of 12704987 in words is "twelve million, seven hundred four thousand, nine hundred eighty-seven".