121850 has 12 divisors (see below), whose sum is σ = 226734. Its totient is φ = 48720.

The previous prime is 121843. The next prime is 121853. The reversal of 121850 is 58121.

It can be written as a sum of positive squares in 3 ways, for example, as 113569 + 8281 = 337^2 + 91^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121853) 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, 1169 + ... + 1268.

2¹²¹⁸⁵⁰ is an apocalyptic number.

121850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121850 is a deficient number, since it is larger than the sum of its proper divisors (104884).

121850 is a wasteful number, since it uses less digits than its factorization.

121850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2444 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 121850 is about 349.0701935141. The cubic root of 121850 is about 49.5764217626.

Adding to 121850 its reverse (58121), we get a palindrome (179971).

The spelling of 121850 in words is "one hundred twenty-one thousand, eight hundred fifty".