2836561 has 24 divisors (see below), whose sum is σ = 3661224. Its totient is φ = 2177280.

The previous prime is 2836553. The next prime is 2836597. The reversal of 2836561 is 1656382.

It can be written as a sum of positive squares in 4 ways, for example, as 14161 + 2822400 = 119^2 + 1680^2 .

It is not a de Polignac number, because 2836561 - 2³ = 2836553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2836261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38821 + ... + 38893.

It is an arithmetic number, because the mean of its divisors is an integer number (152551).

2^2836561 is an apocalyptic number.

It is an amenable number.

2836561 is a deficient number, since it is larger than the sum of its proper divisors (824663).

2836561 is a wasteful number, since it uses less digits than its factorization.

2836561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 154 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 2836561 is about 1684.2093100325. The cubic root of 2836561 is about 141.5567910817.

The spelling of 2836561 in words is "two million, eight hundred thirty-six thousand, five hundred sixty-one".