122681805 has 16 divisors (see below), whose sum is σ = 196937664. Its totient is φ = 65214720.

The previous prime is 122681791. The next prime is 122681821. The reversal of 122681805 is 508186221.

It is not a de Polignac number, because 122681805 - 2¹¹ = 122679757 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 8716 + ... + 17925.

It is an arithmetic number, because the mean of its divisors is an integer number (12308604).

Almost surely, 2^122681805 is an apocalyptic number.

122681805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122681805 is a deficient number, since it is larger than the sum of its proper divisors (74255859).

122681805 is a wasteful number, since it uses less digits than its factorization.

122681805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26956.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 122681805 is about 11076.1818782467. The cubic root of 122681805 is about 496.8897663425.

The spelling of 122681805 in words is "one hundred twenty-two million, six hundred eighty-one thousand, eight hundred five".