2861563 has 4 divisors (see below), whose sum is σ = 2865168. Its totient is φ = 2857960.

The previous prime is 2861561. The next prime is 2861569. The reversal of 2861563 is 3651682.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2861563 - 2¹ = 2861561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2861561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31 + ... + 2392.

It is an arithmetic number, because the mean of its divisors is an integer number (716292).

2^2861563 is an apocalyptic number.

2861563 is a deficient number, since it is larger than the sum of its proper divisors (3605).

2861563 is a wasteful number, since it uses less digits than its factorization.

2861563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604.

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

The square root of 2861563 is about 1691.6155000472. The cubic root of 2861563 is about 141.9714781041.

It can be divided in two parts, 286 and 1563, that added together give a square (1849 = 43²).

The spelling of 2861563 in words is "two million, eight hundred sixty-one thousand, five hundred sixty-three".