2256745 has 8 divisors (see below), whose sum is σ = 2716416. Its totient is φ = 1799856.

The previous prime is 2256743. The next prime is 2256781. The reversal of 2256745 is 5476522.

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 2256745 - 2¹ = 2256743 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 2¹⁹ + 5³ + 6⁸ + 7⁵ + 4² + 5⁵ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2184 + ... + 3046.

It is an arithmetic number, because the mean of its divisors is an integer number (339552).

2^2256745 is an apocalyptic number.

It is an amenable number.

2256745 is a deficient number, since it is larger than the sum of its proper divisors (459671).

2256745 is an equidigital number, since it uses as much as digits as its factorization.

2256745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391.

The product of its digits is 16800, while the sum is 31.

The square root of 2256745 is about 1502.2466508533. The cubic root of 2256745 is about 131.1678790901.

The spelling of 2256745 in words is "two million, two hundred fifty-six thousand, seven hundred forty-five".