2881761 has 4 divisors (see below), whose sum is σ = 3842352. Its totient is φ = 1921172.

The previous prime is 2881733. The next prime is 2881783. The reversal of 2881761 is 1671882.

It is a happy number.

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 2881761 - 2¹¹ = 2879713 is a prime.

It is a super-2 number, since 2×2881761² = 16609092922242, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2881061) 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, 480291 + ... + 480296.

It is an arithmetic number, because the mean of its divisors is an integer number (960588).

2^2881761 is an apocalyptic number.

It is an amenable number.

2881761 is a deficient number, since it is larger than the sum of its proper divisors (960591).

2881761 is an equidigital number, since it uses as much as digits as its factorization.

2881761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960590.

The product of its digits is 5376, while the sum is 33.

The square root of 2881761 is about 1697.5750351604. The cubic root of 2881761 is about 142.3047248318.

The spelling of 2881761 in words is "two million, eight hundred eighty-one thousand, seven hundred sixty-one".