122288561 has 2 divisors, whose sum is σ = 122288562. Its totient is φ = 122288560.

The previous prime is 122288549. The next prime is 122288597. The reversal of 122288561 is 165882221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69639025 + 52649536 = 8345^2 + 7256^2 .

It is a cyclic number.

It is not a de Polignac number, because 122288561 - 2²⁶ = 55179697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122285561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61144280 + 61144281.

It is an arithmetic number, because the mean of its divisors is an integer number (61144281).

Almost surely, 2^122288561 is an apocalyptic number.

It is an amenable number.

122288561 is a deficient number, since it is larger than the sum of its proper divisors (1).

122288561 is an equidigital number, since it uses as much as digits as its factorization.

122288561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 35.

The square root of 122288561 is about 11058.4158449572. The cubic root of 122288561 is about 496.3582882668.

The spelling of 122288561 in words is "one hundred twenty-two million, two hundred eighty-eight thousand, five hundred sixty-one".