122500138 has 8 divisors (see below), whose sum is σ = 183798180. Its totient is φ = 61234080.

The previous prime is 122500129. The next prime is 122500159. The reversal of 122500138 is 831005221.

It can be written as a sum of positive squares in 2 ways, for example, as 117223929 + 5276209 = 10827^2 + 2297^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7908 + ... + 17536.

Almost surely, 2^122500138 is an apocalyptic number.

122500138 is a deficient number, since it is larger than the sum of its proper divisors (61298042).

122500138 is an equidigital number, since it uses as much as digits as its factorization.

122500138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15992.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 122500138 is about 11067.9780447921. The cubic root of 122500138 is about 496.6443806845.

Adding to 122500138 its reverse (831005221), we get a palindrome (953505359).

The spelling of 122500138 in words is "one hundred twenty-two million, five hundred thousand, one hundred thirty-eight".