122155620 has 24 divisors (see below), whose sum is σ = 342035904. Its totient is φ = 32574816.

The previous prime is 122155613. The next prime is 122155651. The reversal of 122155620 is 26551221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017904 + ... + 1018023.

It is an arithmetic number, because the mean of its divisors is an integer number (14251496).

Almost surely, 2^122155620 is an apocalyptic number.

122155620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122155620 is an abundant number, since it is smaller than the sum of its proper divisors (219880284).

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

122155620 is a wasteful number, since it uses less digits than its factorization.

122155620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035939 (or 2035937 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 122155620 is about 11052.4033585460. The cubic root of 122155620 is about 496.1783578558.

The spelling of 122155620 in words is "one hundred twenty-two million, one hundred fifty-five thousand, six hundred twenty".