2256567 has 4 divisors (see below), whose sum is σ = 3008760. Its totient is φ = 1504376.

The previous prime is 2256559. The next prime is 2256571. The reversal of 2256567 is 7656522.

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 2256567 - 2³ = 2256559 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 2²¹ + 5⁷ + 6² + 5⁷ + 6³ + 7⁴ .

It is a D-number.

2256567 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376092 + ... + 376097.

It is an arithmetic number, because the mean of its divisors is an integer number (752190).

2^2256567 is an apocalyptic number.

2256567 is a deficient number, since it is larger than the sum of its proper divisors (752193).

2256567 is an equidigital number, since it uses as much as digits as its factorization.

2256567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752192.

The product of its digits is 25200, while the sum is 33.

The square root of 2256567 is about 1502.1874050863. The cubic root of 2256567 is about 131.1644303921.

The spelling of 2256567 in words is "two million, two hundred fifty-six thousand, five hundred sixty-seven".