122455220 has 48 divisors (see below), whose sum is σ = 269377920. Its totient is φ = 46670976.

The previous prime is 122455213. The next prime is 122455241. The reversal of 122455220 is 22554221.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233879 + ... + 234401.

It is an arithmetic number, because the mean of its divisors is an integer number (5612040).

Almost surely, 2^122455220 is an apocalyptic number.

122455220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122455220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134688960).

122455220 is an abundant number, since it is smaller than the sum of its proper divisors (146922700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122455220 is a wasteful number, since it uses less digits than its factorization.

122455220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 122455220 is about 11065.9486714877. The cubic root of 122455220 is about 496.5836705502.

Subtracting from 122455220 its reverse (22554221), we obtain a palindrome (99900999).

The spelling of 122455220 in words is "one hundred twenty-two million, four hundred fifty-five thousand, two hundred twenty".