122255261 has 2 divisors, whose sum is σ = 122255262. Its totient is φ = 122255260.

The previous prime is 122255249. The next prime is 122255267. The reversal of 122255261 is 162552221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87516025 + 34739236 = 9355^2 + 5894^2 .

It is a cyclic number.

It is not a de Polignac number, because 122255261 - 2⁶ = 122255197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 122255261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122255267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61127630 + 61127631.

It is an arithmetic number, because the mean of its divisors is an integer number (61127631).

Almost surely, 2^122255261 is an apocalyptic number.

It is an amenable number.

122255261 is a deficient number, since it is larger than the sum of its proper divisors (1).

122255261 is an equidigital number, since it uses as much as digits as its factorization.

122255261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 26.

The square root of 122255261 is about 11056.9101018322. The cubic root of 122255261 is about 496.3132302734.

The spelling of 122255261 in words is "one hundred twenty-two million, two hundred fifty-five thousand, two hundred sixty-one".