122381857 has 6 divisors (see below), whose sum is σ = 132520182. Its totient is φ = 112967712.

The previous prime is 122381849. The next prime is 122381881. The reversal of 122381857 is 758183221.

It can be written as a sum of positive squares in 3 ways, for example, as 698896 + 121682961 = 836^2 + 11031^2 .

It is not a de Polignac number, because 122381857 - 2³ = 122381849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122381957) 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 in 5 ways as a sum of consecutive naturals, for example, 361908 + ... + 362245.

It is an arithmetic number, because the mean of its divisors is an integer number (22086697).

Almost surely, 2^122381857 is an apocalyptic number.

It is an amenable number.

122381857 is a deficient number, since it is larger than the sum of its proper divisors (10138325).

122381857 is an equidigital number, since it uses as much as digits as its factorization.

122381857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724179 (or 724166 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 122381857 is about 11062.6333664277. The cubic root of 122381857 is about 496.4844828757.

The spelling of 122381857 in words is "one hundred twenty-two million, three hundred eighty-one thousand, eight hundred fifty-seven".