122155289 has 2 divisors, whose sum is σ = 122155290. Its totient is φ = 122155288.

The previous prime is 122155247. The next prime is 122155291. The reversal of 122155289 is 982551221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90402064 + 31753225 = 9508^2 + 5635^2 .

It is a cyclic number.

It is not a de Polignac number, because 122155289 - 2¹² = 122151193 is a prime.

It is a Sophie Germain prime.

Together with 122155291, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (122155589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61077644 + 61077645.

It is an arithmetic number, because the mean of its divisors is an integer number (61077645).

Almost surely, 2^122155289 is an apocalyptic number.

It is an amenable number.

122155289 is a deficient number, since it is larger than the sum of its proper divisors (1).

122155289 is an equidigital number, since it uses as much as digits as its factorization.

122155289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 35.

The square root of 122155289 is about 11052.3883844172. The cubic root of 122155289 is about 496.1779096975.

The spelling of 122155289 in words is "one hundred twenty-two million, one hundred fifty-five thousand, two hundred eighty-nine".