121472784 has 120 divisors (see below), whose sum is σ = 356574400. Its totient is φ = 40030848.

The previous prime is 121472779. The next prime is 121472789. The reversal of 121472784 is 487274121.

It is an interprime number because it is at equal distance from previous prime (121472779) and next prime (121472789).

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 (121472789) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 610317 + ... + 610515.

Almost surely, 2^121472784 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 121472784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178287200).

121472784 is an abundant number, since it is smaller than the sum of its proper divisors (235101616).

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

121472784 is a wasteful number, since it uses less digits than its factorization.

121472784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 361 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 121472784 is about 11021.4692305518. The cubic root of 121472784 is about 495.2521029874.

The spelling of 121472784 in words is "one hundred twenty-one million, four hundred seventy-two thousand, seven hundred eighty-four".