121980784 has 40 divisors (see below), whose sum is σ = 246984192. Its totient is φ = 58292160.

The previous prime is 121980767. The next prime is 121980791. The reversal of 121980784 is 487089121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 39687 + ... + 42649.

Almost surely, 2^121980784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121980784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123492096).

121980784 is an abundant number, since it is smaller than the sum of its proper divisors (125003408).

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

121980784 is a wasteful number, since it uses less digits than its factorization.

121980784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085 (or 3079 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 121980784 is about 11044.4911154838. The cubic root of 121980784 is about 495.9415253646.

The spelling of 121980784 in words is "one hundred twenty-one million, nine hundred eighty thousand, seven hundred eighty-four".