2256671 has 4 divisors (see below), whose sum is σ = 2270352. Its totient is φ = 2242992.

The previous prime is 2256637. The next prime is 2256673. The reversal of 2256671 is 1766522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2256671 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 (2256673) 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, 6590 + ... + 6923.

It is an arithmetic number, because the mean of its divisors is an integer number (567588).

2^2256671 is an apocalyptic number.

2256671 is a deficient number, since it is larger than the sum of its proper divisors (13681).

2256671 is a wasteful number, since it uses less digits than its factorization.

2256671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13680.

The product of its digits is 5040, while the sum is 29.

The square root of 2256671 is about 1502.2220208744. Note that the first 3 decimals coincide. The cubic root of 2256671 is about 131.1664453837.

The spelling of 2256671 in words is "two million, two hundred fifty-six thousand, six hundred seventy-one".