122420978 has 12 divisors (see below), whose sum is σ = 195069642. Its totient is φ = 57609600.

The previous prime is 122420951. The next prime is 122420999. The reversal of 122420978 is 879024221.

It can be written as a sum of positive squares in 3 ways, for example, as 102556129 + 19864849 = 10127^2 + 4457^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105323 + ... + 106478.

Almost surely, 2^122420978 is an apocalyptic number.

122420978 is a deficient number, since it is larger than the sum of its proper divisors (72648664).

122420978 is a wasteful number, since it uses less digits than its factorization.

122420978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211837 (or 211820 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 122420978 is about 11064.4013846209. The cubic root of 122420978 is about 496.5373798783.

The spelling of 122420978 in words is "one hundred twenty-two million, four hundred twenty thousand, nine hundred seventy-eight".