2256439 has 4 divisors (see below), whose sum is σ = 2269656. Its totient is φ = 2243224.

The previous prime is 2256437. The next prime is 2256467. The reversal of 2256439 is 9346522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9346522 = 2 ⋅4673261.

It is a cyclic number.

It is not a de Polignac number, because 2256439 - 2¹ = 2256437 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 2¹⁹ + 5³ + 6 + 4³ + 3¹³ + 9⁴ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2256439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6349 + ... + 6694.

It is an arithmetic number, because the mean of its divisors is an integer number (567414).

2^2256439 is an apocalyptic number.

2256439 is a deficient number, since it is larger than the sum of its proper divisors (13217).

2256439 is a wasteful number, since it uses less digits than its factorization.

2256439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13216.

The product of its digits is 12960, while the sum is 31.

The square root of 2256439 is about 1502.1447999444. The cubic root of 2256439 is about 131.1619503173.

The spelling of 2256439 in words is "two million, two hundred fifty-six thousand, four hundred thirty-nine".