2566745 has 8 divisors (see below), whose sum is σ = 3261384. Its totient is φ = 1932544.

The previous prime is 2566709. The next prime is 2566747. The reversal of 2566745 is 5476652.

2566745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 292681 + 2274064 = 541^2 + 1508^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2566745 - 2⁸ = 2566489 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁷ + 6 + 6⁵ + 7⁴ + 4⁵ + 5⁹ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2566747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15014 + ... + 15183.

It is an arithmetic number, because the mean of its divisors is an integer number (407673).

2^2566745 is an apocalyptic number.

It is an amenable number.

2566745 is a deficient number, since it is larger than the sum of its proper divisors (694639).

2566745 is a wasteful number, since it uses less digits than its factorization.

2566745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30219.

The product of its digits is 50400, while the sum is 35.

The square root of 2566745 is about 1602.1064259281. The cubic root of 2566745 is about 136.9181139941.

The spelling of 2566745 in words is "two million, five hundred sixty-six thousand, seven hundred forty-five".