2556011 has 2 divisors, whose sum is σ = 2556012. Its totient is φ = 2556010.

The previous prime is 2555989. The next prime is 2556019. The reversal of 2556011 is 1106552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2556011 - 2¹⁴ = 2539627 is a prime.

It is not a weakly prime, because it can be changed into another prime (2556019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278005 + 1278006.

It is an arithmetic number, because the mean of its divisors is an integer number (1278006).

2^2556011 is an apocalyptic number.

2556011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556011 is an equidigital number, since it uses as much as digits as its factorization.

2556011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2556011 is about 1598.7529515219. The cubic root of 2556011 is about 136.7269857341.

The spelling of 2556011 in words is "two million, five hundred fifty-six thousand, eleven".