1287000001 has 8 divisors (see below), whose sum is σ = 1491006464. Its totient is φ = 1088030880.

The previous prime is 1286999953. The next prime is 1287000067. The reversal of 1287000001 is 1000007821.

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 1287000001 - 2¹⁹ = 1286475713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287000401) 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, 1258785 + ... + 1259806.

It is an arithmetic number, because the mean of its divisors is an integer number (186375808).

Almost surely, 2^1287000001 is an apocalyptic number.

It is an amenable number.

1287000001 is a deficient number, since it is larger than the sum of its proper divisors (204006463).

1287000001 is an equidigital number, since it uses as much as digits as its factorization.

1287000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518671.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 1287000001 is about 35874.7822432416. The cubic root of 1287000001 is about 1087.7427126560.

Adding to 1287000001 its reverse (1000007821), we get a palindrome (2287007822).

The spelling of 1287000001 in words is "one billion, two hundred eighty-seven million, one", and thus it is an aban number.