2841561 has 10 divisors (see below), whose sum is σ = 4244922. Its totient is φ = 1894320.

The previous prime is 2841557. The next prime is 2841589. The reversal of 2841561 is 1651482.

It can be written as a sum of positive squares in only one way, i.e., 2742336 + 99225 = 1656^2 + 315^2 .

It is not a de Polignac number, because 2841561 - 2² = 2841557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2841511) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 17460 + ... + 17621.

2^2841561 is an apocalyptic number.

It is an amenable number.

2841561 is a deficient number, since it is larger than the sum of its proper divisors (1403361).

2841561 is an equidigital number, since it uses as much as digits as its factorization.

2841561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35093 (or 35084 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 2841561 is about 1685.6930325537. The cubic root of 2841561 is about 141.6399162102.

The spelling of 2841561 in words is "two million, eight hundred forty-one thousand, five hundred sixty-one".