2842561 has 4 divisors (see below), whose sum is σ = 2890800. Its totient is φ = 2794324.

The previous prime is 2842559. The next prime is 2842573. The reversal of 2842561 is 1652482.

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 2842561 - 2¹ = 2842559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2842531) 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, 24031 + ... + 24148.

It is an arithmetic number, because the mean of its divisors is an integer number (722700).

2^2842561 is an apocalyptic number.

It is an amenable number.

2842561 is a deficient number, since it is larger than the sum of its proper divisors (48239).

2842561 is an equidigital number, since it uses as much as digits as its factorization.

2842561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48238.

The product of its digits is 3840, while the sum is 28.

The square root of 2842561 is about 1685.9896203714. The cubic root of 2842561 is about 141.6565295322.

It can be divided in two parts, 2842 and 561, that added together give a triangular number (3403 = T₈₂).

The spelling of 2842561 in words is "two million, eight hundred forty-two thousand, five hundred sixty-one".