2566245 has 32 divisors (see below), whose sum is σ = 4552704. Its totient is φ = 1224000.

The previous prime is 2566241. The next prime is 2566253. The reversal of 2566245 is 5426652.

2566245 is a nontrivial binomial coefficient, being equal to C(2266, 2).

It is not a de Polignac number, because 2566245 - 2² = 2566241 is a prime.

It is a super-2 number, since 2×2566245² = 13171226800050, which contains 22 as substring.

2566245 is a lucky number.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 16920 + ... + 17070.

It is an arithmetic number, because the mean of its divisors is an integer number (142272).

2^2566245 is an apocalyptic number.

2566245 is the 2265-th triangular number and also the 1133-rd hexagonal number.

It is an amenable number.

2566245 is a deficient number, since it is larger than the sum of its proper divisors (1986459).

2566245 is a wasteful number, since it uses less digits than its factorization.

2566245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273.

The product of its digits is 14400, while the sum is 30.

The square root of 2566245 is about 1601.9503737632. The cubic root of 2566245 is about 136.9092229014.

The spelling of 2566245 in words is "two million, five hundred sixty-six thousand, two hundred forty-five".