122578020 has 36 divisors (see below), whose sum is σ = 371820540. Its totient is φ = 32687424.

The previous prime is 122577997. The next prime is 122578033. The reversal of 122578020 is 20875221.

It can be written as a sum of positive squares in 2 ways, for example, as 19027044 + 103550976 = 4362^2 + 10176^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 340315 + ... + 340674.

Almost surely, 2^122578020 is an apocalyptic number.

122578020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122578020 is an abundant number, since it is smaller than the sum of its proper divisors (249242520).

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

122578020 is a wasteful number, since it uses less digits than its factorization.

122578020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681004 (or 680999 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 122578020 is about 11071.4958338971. The cubic root of 122578020 is about 496.7496090379.

The spelling of 122578020 in words is "one hundred twenty-two million, five hundred seventy-eight thousand, twenty".