122685687 has 6 divisors (see below), whose sum is σ = 177212672. Its totient is φ = 81790452.

The previous prime is 122685593. The next prime is 122685691. The reversal of 122685687 is 786586221.

122685687 is a `hidden beast` number, since 1 + 22 + 68 + 568 + 7 = 666.

It is not a de Polignac number, because 122685687 - 2⁷ = 122685559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122685287) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6815863 + ... + 6815880.

Almost surely, 2^122685687 is an apocalyptic number.

122685687 is a deficient number, since it is larger than the sum of its proper divisors (54526985).

122685687 is a wasteful number, since it uses less digits than its factorization.

122685687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13631749 (or 13631746 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 122685687 is about 11076.3571177531. The cubic root of 122685687 is about 496.8950072874.

It can be divided in two parts, 12268 and 5687, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 122685687 in words is "one hundred twenty-two million, six hundred eighty-five thousand, six hundred eighty-seven".