2556061 has 2 divisors, whose sum is σ = 2556062. Its totient is φ = 2556060.

The previous prime is 2556041. The next prime is 2556067. The reversal of 2556061 is 1606552.

2556061 = 1130² + 1131².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1279161 + 1276900 = 1131^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556061 - 2⁹ = 2555549 is a prime.

2556061 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278030 + 1278031.

It is an arithmetic number, because the mean of its divisors is an integer number (1278031).

2^2556061 is an apocalyptic number.

2556061 is the 1131-st centered square number.

It is an amenable number.

2556061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556061 is an equidigital number, since it uses as much as digits as its factorization.

2556061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2556061 is about 1598.7685886331. The cubic root of 2556061 is about 136.7278772671.

The spelling of 2556061 in words is "two million, five hundred fifty-six thousand, sixty-one".