2256487 has 4 divisors (see below), whose sum is σ = 2259576. Its totient is φ = 2253400.

The previous prime is 2256479. The next prime is 2256533. The reversal of 2256487 is 7846522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7846522 = 2 ⋅3923261.

It is a cyclic number.

It is not a de Polignac number, because 2256487 - 2³ = 2256479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256437) 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, 237 + ... + 2137.

It is an arithmetic number, because the mean of its divisors is an integer number (564894).

2^2256487 is an apocalyptic number.

2256487 is a deficient number, since it is larger than the sum of its proper divisors (3089).

2256487 is a wasteful number, since it uses less digits than its factorization.

2256487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088.

The product of its digits is 26880, while the sum is 34.

The square root of 2256487 is about 1502.1607770142. The cubic root of 2256487 is about 131.1628803563.

The spelling of 2256487 in words is "two million, two hundred fifty-six thousand, four hundred eighty-seven".