2555261 has 2 divisors, whose sum is σ = 2555262. Its totient is φ = 2555260.

The previous prime is 2555251. The next prime is 2555263. The reversal of 2555261 is 1625552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2544025 + 11236 = 1595^2 + 106^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555261 - 2⁶ = 2555197 is a prime.

Together with 2555263, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2555261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2555263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277630 + 1277631.

It is an arithmetic number, because the mean of its divisors is an integer number (1277631).

2^2555261 is an apocalyptic number.

It is an amenable number.

2555261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555261 is an equidigital number, since it uses as much as digits as its factorization.

2555261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 26.

The square root of 2555261 is about 1598.5183764974. The cubic root of 2555261 is about 136.7136113432.

The spelling of 2555261 in words is "two million, five hundred fifty-five thousand, two hundred sixty-one".