2556171 has 16 divisors (see below), whose sum is σ = 4010400. Its totient is φ = 1603584.

The previous prime is 2556163. The next prime is 2556179. The reversal of 2556171 is 1716552.

It is an interprime number because it is at equal distance from previous prime (2556163) and next prime (2556179).

It is not a de Polignac number, because 2556171 - 2³ = 2556163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2556179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2326 + ... + 3243.

It is an arithmetic number, because the mean of its divisors is an integer number (250650).

2^2556171 is an apocalyptic number.

2556171 is a deficient number, since it is larger than the sum of its proper divisors (1454229).

2556171 is a wasteful number, since it uses less digits than its factorization.

2556171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5595 (or 5589 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 2556171 is about 1598.8029897395. The cubic root of 2556171 is about 136.7298385989.

The spelling of 2556171 in words is "two million, five hundred fifty-six thousand, one hundred seventy-one".