2081761 has 4 divisors (see below), whose sum is σ = 2271024. Its totient is φ = 1892500.

The previous prime is 2081749. The next prime is 2081777. The reversal of 2081761 is 1671802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2081761 - 2⁹ = 2081249 is a prime.

It is a super-2 number, since 2×2081761² = 8667457722242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2081161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94615 + ... + 94636.

It is an arithmetic number, because the mean of its divisors is an integer number (567756).

2^2081761 is an apocalyptic number.

It is an amenable number.

2081761 is a deficient number, since it is larger than the sum of its proper divisors (189263).

2081761 is a wasteful number, since it uses less digits than its factorization.

2081761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189262.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 2081761 is about 1442.8308979226. The cubic root of 2081761 is about 127.6861001426.

Multiplying 2081761 by its sum of digits (25), we get a palindrome (52044025).

The spelling of 2081761 in words is "two million, eighty-one thousand, seven hundred sixty-one".