121650 has 24 divisors (see below), whose sum is σ = 302064. Its totient is φ = 32400.

The previous prime is 121637. The next prime is 121661. The reversal of 121650 is 56121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256 + ... + 555.

It is an arithmetic number, because the mean of its divisors is an integer number (12586).

2¹²¹⁶⁵⁰ is an apocalyptic number.

121650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121650 is an abundant number, since it is smaller than the sum of its proper divisors (180414).

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

121650 is a wasteful number, since it uses less digits than its factorization.

121650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 121650 is about 348.7836005319. The cubic root of 121650 is about 49.5492826184.

Adding to 121650 its reverse (56121), we get a palindrome (177771).

The spelling of 121650 in words is "one hundred twenty-one thousand, six hundred fifty".