2081287 has 8 divisors (see below), whose sum is σ = 2302496. Its totient is φ = 1868832.

The previous prime is 2081281. The next prime is 2081291. The reversal of 2081287 is 7821802.

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 2081287 - 2⁷ = 2081159 is a prime.

It is a Duffinian number.

2081287 is a modest number, since divided by 1287 gives 208 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081281) 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, 1683 + ... + 2644.

It is an arithmetic number, because the mean of its divisors is an integer number (287812).

2^2081287 is an apocalyptic number.

2081287 is a deficient number, since it is larger than the sum of its proper divisors (221209).

2081287 is a wasteful number, since it uses less digits than its factorization.

2081287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4377.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2081287 is about 1442.6666281577. Note that the first 4 decimals coincide. The cubic root of 2081287 is about 127.6764083792.

The spelling of 2081287 in words is "two million, eighty-one thousand, two hundred eighty-seven".