254855561 has 2 divisors, whose sum is σ = 254855562. Its totient is φ = 254855560.

The previous prime is 254855533. The next prime is 254855581. The reversal of 254855561 is 165558452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212605561 + 42250000 = 14581^2 + 6500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254855561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (254855521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127427780 + 127427781.

It is an arithmetic number, because the mean of its divisors is an integer number (127427781).

Almost surely, 2^254855561 is an apocalyptic number.

It is an amenable number.

254855561 is a deficient number, since it is larger than the sum of its proper divisors (1).

254855561 is an equidigital number, since it uses as much as digits as its factorization.

254855561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240000, while the sum is 41.

The square root of 254855561 is about 15964.1962215453. The cubic root of 254855561 is about 634.0128178934.

The spelling of 254855561 in words is "two hundred fifty-four million, eight hundred fifty-five thousand, five hundred sixty-one".