2566243 has 4 divisors (see below), whose sum is σ = 2574328. Its totient is φ = 2558160.

The previous prime is 2566241. The next prime is 2566253. The reversal of 2566243 is 3426652.

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 2566243 - 2¹ = 2566241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2566241) 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, 3546 + ... + 4207.

It is an arithmetic number, because the mean of its divisors is an integer number (643582).

2^2566243 is an apocalyptic number.

2566243 is a deficient number, since it is larger than the sum of its proper divisors (8085).

2566243 is an equidigital number, since it uses as much as digits as its factorization.

2566243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8084.

The product of its digits is 8640, while the sum is 28.

The square root of 2566243 is about 1601.9497495240. The cubic root of 2566243 is about 136.9091873347.

It can be divided in two parts, 2566 and 243, that added together give a square (2809 = 53²).

The spelling of 2566243 in words is "two million, five hundred sixty-six thousand, two hundred forty-three".