121980740 has 96 divisors (see below), whose sum is σ = 304819200. Its totient is φ = 40135680.

The previous prime is 121980739. The next prime is 121980751. The reversal of 121980740 is 47089121.

It is a junction number, because it is equal to n+sod(n) for n = 121980697 and 121980706.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 453326 + ... + 453594.

It is an arithmetic number, because the mean of its divisors is an integer number (3175200).

Almost surely, 2^121980740 is an apocalyptic number.

121980740 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 121980740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152409600).

121980740 is an abundant number, since it is smaller than the sum of its proper divisors (182838460).

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

121980740 is a wasteful number, since it uses less digits than its factorization.

121980740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 121980740 is about 11044.4891235403. The cubic root of 121980740 is about 495.9414657338.

The spelling of 121980740 in words is "one hundred twenty-one million, nine hundred eighty thousand, seven hundred forty".