121785036 has 48 divisors (see below), whose sum is σ = 298835040. Its totient is φ = 38545920.

The previous prime is 121785031. The next prime is 121785061. The reversal of 121785036 is 630587121.

It is a junction number, because it is equal to n+sod(n) for n = 121784988 and 121785006.

It is not an unprimeable number, because it can be changed into a prime (121785031) 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, 18360 + ... + 24096.

It is an arithmetic number, because the mean of its divisors is an integer number (6225730).

Almost surely, 2^121785036 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 121785036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149417520).

121785036 is an abundant number, since it is smaller than the sum of its proper divisors (177050004).

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

121785036 is a wasteful number, since it uses less digits than its factorization.

121785036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5834 (or 5832 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 121785036 is about 11035.6257638613. The cubic root of 121785036 is about 495.6760968434.

The spelling of 121785036 in words is "one hundred twenty-one million, seven hundred eighty-five thousand, thirty-six".