2556071 has 16 divisors (see below), whose sum is σ = 3064320. Its totient is φ = 2086560.

The previous prime is 2556067. The next prime is 2556079. The reversal of 2556071 is 1706552.

It is not a de Polignac number, because 2556071 - 2² = 2556067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2556071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556079) 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, 18320 + ... + 18458.

It is an arithmetic number, because the mean of its divisors is an integer number (191520).

2^2556071 is an apocalyptic number.

2556071 is a deficient number, since it is larger than the sum of its proper divisors (508249).

2556071 is a wasteful number, since it uses less digits than its factorization.

2556071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 2556071 is about 1598.7717160370. The cubic root of 2556071 is about 136.7280555723.

The spelling of 2556071 in words is "two million, five hundred fifty-six thousand, seventy-one".