2555871 has 4 divisors (see below), whose sum is σ = 3407832. Its totient is φ = 1703912.

The previous prime is 2555867. The next prime is 2555873. The reversal of 2555871 is 1785552.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2555871 - 2² = 2555867 is a prime.

It is a D-number.

2555871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555873) 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, 425976 + ... + 425981.

It is an arithmetic number, because the mean of its divisors is an integer number (851958).

2^2555871 is an apocalyptic number.

2555871 is a deficient number, since it is larger than the sum of its proper divisors (851961).

2555871 is an equidigital number, since it uses as much as digits as its factorization.

2555871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851960.

The product of its digits is 14000, while the sum is 33.

The square root of 2555871 is about 1598.7091667968. The cubic root of 2555871 is about 136.7244893797.

The spelling of 2555871 in words is "two million, five hundred fifty-five thousand, eight hundred seventy-one".