2566345 has 4 divisors (see below), whose sum is σ = 3079620. Its totient is φ = 2053072.

The previous prime is 2566339. The next prime is 2566351. The reversal of 2566345 is 5436652.

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

It is an interprime number because it is at equal distance from previous prime (2566339) and next prime (2566351).

It can be written as a sum of positive squares in 2 ways, for example, as 1838736 + 727609 = 1356^2 + 853^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566345 - 2¹⁵ = 2533577 is a prime.

It is a super-2 number, since 2×2566345² = 13172253318050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256630 + ... + 256639.

It is an arithmetic number, because the mean of its divisors is an integer number (769905).

2^2566345 is an apocalyptic number.

It is an amenable number.

2566345 is a deficient number, since it is larger than the sum of its proper divisors (513275).

2566345 is an equidigital number, since it uses as much as digits as its factorization.

2566345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513274.

The product of its digits is 21600, while the sum is 31.

The square root of 2566345 is about 1601.9815854123. The cubic root of 2566345 is about 136.9110012123.

The spelling of 2566345 in words is "two million, five hundred sixty-six thousand, three hundred forty-five".