2801563 has 4 divisors (see below), whose sum is σ = 2891968. Its totient is φ = 2711160.

The previous prime is 2801543. The next prime is 2801573. The reversal of 2801563 is 3651082.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2801563 - 2¹⁷ = 2670491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2801543) 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, 45156 + ... + 45217.

It is an arithmetic number, because the mean of its divisors is an integer number (722992).

2^2801563 is an apocalyptic number.

2801563 is a deficient number, since it is larger than the sum of its proper divisors (90405).

2801563 is an equidigital number, since it uses as much as digits as its factorization.

2801563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90404.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2801563 is about 1673.7870234890. The cubic root of 2801563 is about 140.9721957818.

It can be divided in two parts, 2801 and 563, that added together give a square (3364 = 58²).

The spelling of 2801563 in words is "two million, eight hundred one thousand, five hundred sixty-three".