1287011 has 8 divisors (see below), whose sum is σ = 1465344. Its totient is φ = 1118920.

The previous prime is 1287007. The next prime is 1287047. The reversal of 1287011 is 1107821.

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

It is not a de Polignac number, because 1287011 - 2² = 1287007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2291 + ... + 2796.

It is an arithmetic number, because the mean of its divisors is an integer number (183168).

2^1287011 is an apocalyptic number.

1287011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1287011 is a deficient number, since it is larger than the sum of its proper divisors (178333).

1287011 is a wasteful number, since it uses less digits than its factorization.

1287011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5121.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1287011 is about 1134.4650721816. The cubic root of 1287011 is about 108.7745811348.

The spelling of 1287011 in words is "one million, two hundred eighty-seven thousand, eleven".