121668

121668 is a natural number that follows 121667 and precedes 121669. It is even and composite, with a prime factorization of 2^2 × 3 × 10139.

The positive divisors of 121668 are 1, 2, 3, 4, 6, 12, 10139, 20278, 30417, 40556, 60834, and 121668.

Because 2^2 × 3 × 10139 is its factorization, 121668 has 12 divisors. The sum of its divisors is σ(121668) = (2^3−1)/(2−1) × (3^2−1)/(3−1) × (10139^2−1)/(10139−1) = 7 × 4 × 10140 = 283,920. Since this exceeds the number itself, 121668 is an abundant number. Its decimal digit sum is 24, but 24 does not divide 121,668, so it is not a Harshad number.

In astronomy, 121668 may refer to a numbered minor planet designation in the catalog maintained by the Minor Planet Center. Objects with such numbers are typically identified by provisional designations at the time of discovery, before receiving a permanent number.