121785084 has 72 divisors (see below), whose sum is σ = 317011968. Its totient is φ = 39401760.

The previous prime is 121785061. The next prime is 121785091. The reversal of 121785084 is 480587121.

121785084 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

121785084 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 282349 + ... + 282779.

It is an arithmetic number, because the mean of its divisors is an integer number (4402944).

Almost surely, 2^121785084 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 121785084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158505984).

121785084 is an abundant number, since it is smaller than the sum of its proper divisors (195226884).

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

121785084 is a wasteful number, since it uses less digits than its factorization.

121785084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 121785084 is about 11035.6279386358. The cubic root of 121785084 is about 495.6761619648.

The spelling of 121785084 in words is "one hundred twenty-one million, seven hundred eighty-five thousand, eighty-four".