1287004985 has 8 divisors (see below), whose sum is σ = 1765035456. Its totient is φ = 882517680.

The previous prime is 1287004969. The next prime is 1287005011. The reversal of 1287004985 is 5894007821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1287004985 - 2⁴ = 1287004969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18385751 + ... + 18385820.

It is an arithmetic number, because the mean of its divisors is an integer number (220629432).

Almost surely, 2^1287004985 is an apocalyptic number.

It is an amenable number.

1287004985 is a deficient number, since it is larger than the sum of its proper divisors (478030471).

1287004985 is an equidigital number, since it uses as much as digits as its factorization.

1287004985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36771583.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 1287004985 is about 35874.8517070106. The cubic root of 1287004985 is about 1087.7441167748.

The spelling of 1287004985 in words is "one billion, two hundred eighty-seven million, four thousand, nine hundred eighty-five".