122688681 has 8 divisors (see below), whose sum is σ = 172194720. Its totient is φ = 77487552.

The previous prime is 122688637. The next prime is 122688689. The reversal of 122688681 is 186886221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122688681 - 2⁹ = 122688169 is a prime.

It is a super-2 number, since 2×122688681² = 30105024891039522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122688689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076160 + ... + 1076273.

It is an arithmetic number, because the mean of its divisors is an integer number (21524340).

Almost surely, 2^122688681 is an apocalyptic number.

It is an amenable number.

122688681 is a deficient number, since it is larger than the sum of its proper divisors (49506039).

122688681 is a wasteful number, since it uses less digits than its factorization.

122688681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152455.

The product of its digits is 73728, while the sum is 42.

The square root of 122688681 is about 11076.4922696673. The cubic root of 122688681 is about 496.8990493007.

The spelling of 122688681 in words is "one hundred twenty-two million, six hundred eighty-eight thousand, six hundred eighty-one".