688122 has 16 divisors (see below), whose sum is σ = 1529280. Its totient is φ = 229356.

The previous prime is 688111. The next prime is 688133. The reversal of 688122 is 221886.

It is an interprime number because it is at equal distance from previous prime (688111) and next prime (688133).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6318 + ... + 6425.

It is an arithmetic number, because the mean of its divisors is an integer number (95580).

2⁶⁸⁸¹²² is an apocalyptic number.

688122 is an abundant number, since it is smaller than the sum of its proper divisors (841158).

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

688122 is a wasteful number, since it uses less digits than its factorization.

688122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12754 (or 12748 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 688122 is about 829.5311929036. The cubic root of 688122 is about 88.2853170471.

It can be divided in two parts, 6881 and 22, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 688122 in words is "six hundred eighty-eight thousand, one hundred twenty-two".