2841661 has 4 divisors (see below), whose sum is σ = 2854300. Its totient is φ = 2829024.

The previous prime is 2841653. The next prime is 2841679. The reversal of 2841661 is 1661482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1661482 = 2 ⋅830741.

It can be written as a sum of positive squares in 2 ways, for example, as 1279161 + 1562500 = 1131^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2841661 - 2³ = 2841653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2841691) 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, 5976 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (713575).

2^2841661 is an apocalyptic number.

It is an amenable number.

2841661 is a deficient number, since it is larger than the sum of its proper divisors (12639).

2841661 is a wasteful number, since it uses less digits than its factorization.

2841661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12638.

The product of its digits is 2304, while the sum is 28.

The square root of 2841661 is about 1685.7226936836. The cubic root of 2841661 is about 141.6415777178.

The spelling of 2841661 in words is "two million, eight hundred forty-one thousand, six hundred sixty-one".