121845384 has 80 divisors (see below), whose sum is σ = 347173200. Its totient is φ = 39914208.

The previous prime is 121845379. The next prime is 121845389. The reversal of 121845384 is 483548121.

121845384 is a `hidden beast` number, since 121 + 8 + 453 + 84 = 666.

It is an interprime number because it is at equal distance from previous prime (121845379) and next prime (121845389).

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

It is not an unprimeable number, because it can be changed into a prime (121845389) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36639 + ... + 39825.

It is an arithmetic number, because the mean of its divisors is an integer number (4339665).

Almost surely, 2^121845384 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 121845384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173586600).

121845384 is an abundant number, since it is smaller than the sum of its proper divisors (225327816).

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

121845384 is a wasteful number, since it uses less digits than its factorization.

121845384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264 (or 3251 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 121845384 is about 11038.3596607467. The cubic root of 121845384 is about 495.7579572605.

The spelling of 121845384 in words is "one hundred twenty-one million, eight hundred forty-five thousand, three hundred eighty-four".