121940 has 48 divisors (see below), whose sum is σ = 319872. Its totient is φ = 38016.

The previous prime is 121937. The next prime is 121949. The reversal of 121940 is 49121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1787 + ... + 1853.

It is an arithmetic number, because the mean of its divisors is an integer number (6664).

2¹²¹⁹⁴⁰ is an apocalyptic number.

121940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159936).

121940 is an abundant number, since it is smaller than the sum of its proper divisors (197932).

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

121940 is a wasteful number, since it uses less digits than its factorization.

121940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 121940 is about 349.1990836185. The cubic root of 121940 is about 49.5886246893.

The spelling of 121940 in words is "one hundred twenty-one thousand, nine hundred forty".