2556671 has 8 divisors (see below), whose sum is σ = 2770320. Its totient is φ = 2345472.

The previous prime is 2556661. The next prime is 2556683. The reversal of 2556671 is 1766552.

It is a happy number.

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 2556671 - 2⁶ = 2556607 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 (2556641) 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 7 ways as a sum of consecutive naturals, for example, 2000 + ... + 3018.

It is an arithmetic number, because the mean of its divisors is an integer number (346290).

2^2556671 is an apocalyptic number.

2556671 is a deficient number, since it is larger than the sum of its proper divisors (213649).

2556671 is a wasteful number, since it uses less digits than its factorization.

2556671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225.

The product of its digits is 12600, while the sum is 32.

The square root of 2556671 is about 1598.9593490768. The cubic root of 2556671 is about 136.7387530341.

The spelling of 2556671 in words is "two million, five hundred fifty-six thousand, six hundred seventy-one".