122505678 has 12 divisors (see below), whose sum is σ = 265429008. Its totient is φ = 40835220.

The previous prime is 122505661. The next prime is 122505697. The reversal of 122505678 is 876505221.

It is a happy number.

It is a super-2 number, since 2×122505678² = 30015282284479368, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3402918 + ... + 3402953.

It is an arithmetic number, because the mean of its divisors is an integer number (22119084).

Almost surely, 2^122505678 is an apocalyptic number.

122505678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

122505678 is an abundant number, since it is smaller than the sum of its proper divisors (142923330).

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

122505678 is a wasteful number, since it uses less digits than its factorization.

122505678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6805879 (or 6805876 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 122505678 is about 11068.2283135107. The cubic root of 122505678 is about 496.6518673928.

The spelling of 122505678 in words is "one hundred twenty-two million, five hundred five thousand, six hundred seventy-eight".