122505155 has 4 divisors (see below), whose sum is σ = 147006192. Its totient is φ = 98004120.

The previous prime is 122505143. The next prime is 122505157. The reversal of 122505155 is 551505221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551505221 = 31 ⋅17790491.

It is not a de Polignac number, because 122505155 - 2⁶ = 122505091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122505157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12250511 + ... + 12250520.

It is an arithmetic number, because the mean of its divisors is an integer number (36751548).

Almost surely, 2^122505155 is an apocalyptic number.

122505155 is a deficient number, since it is larger than the sum of its proper divisors (24501037).

122505155 is an equidigital number, since it uses as much as digits as its factorization.

122505155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24501036.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 122505155 is about 11068.2046873014. The cubic root of 122505155 is about 496.6511606248.

The spelling of 122505155 in words is "one hundred twenty-two million, five hundred five thousand, one hundred fifty-five".