2081817 has 12 divisors (see below), whose sum is σ = 3023280. Its totient is φ = 1380408.

The previous prime is 2081813. The next prime is 2081831. The reversal of 2081817 is 7181802.

It is not a de Polignac number, because 2081817 - 2² = 2081813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2081813) 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 11 ways as a sum of consecutive naturals, for example, 1534 + ... + 2552.

It is an arithmetic number, because the mean of its divisors is an integer number (251940).

2^2081817 is an apocalyptic number.

It is an amenable number.

2081817 is a deficient number, since it is larger than the sum of its proper divisors (941463).

2081817 is a wasteful number, since it uses less digits than its factorization.

2081817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 1249 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 2081817 is about 1442.8503040856. The cubic root of 2081817 is about 127.6872450639.

It can be divided in two parts, 208 and 1817, that added together give a square (2025 = 45²).

The spelling of 2081817 in words is "two million, eighty-one thousand, eight hundred seventeen".