122861 has 2 divisors, whose sum is σ = 122862. Its totient is φ = 122860.

The previous prime is 122849. The next prime is 122867. The reversal of 122861 is 168221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122500 + 361 = 350^2 + 19^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122861 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 6.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61430 + 61431.

It is an arithmetic number, because the mean of its divisors is an integer number (61431).

2¹²²⁸⁶¹ is an apocalyptic number.

It is an amenable number.

122861 is a deficient number, since it is larger than the sum of its proper divisors (1).

122861 is an equidigital number, since it uses as much as digits as its factorization.

122861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 20.

The square root of 122861 is about 350.5153348999. The cubic root of 122861 is about 49.7131575753.

The spelling of 122861 in words is "one hundred twenty-two thousand, eight hundred sixty-one".