121539344 has 20 divisors (see below), whose sum is σ = 243079680. Its totient is φ = 58809120.

The previous prime is 121539343. The next prime is 121539349. The reversal of 121539344 is 443935121.

121539344 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 121539344.

It is not an unprimeable number, because it can be changed into a prime (121539343) 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 3 ways as a sum of consecutive naturals, for example, 122024 + ... + 123015.

It is an arithmetic number, because the mean of its divisors is an integer number (12153984).

Almost surely, 2^121539344 is an apocalyptic number.

It is an amenable number.

121539344 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121539344 is a wasteful number, since it uses less digits than its factorization.

121539344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245078 (or 245072 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 121539344 is about 11024.4883781516. The cubic root of 121539344 is about 495.3425428921.

The spelling of 121539344 in words is "one hundred twenty-one million, five hundred thirty-nine thousand, three hundred forty-four".