121450240 has 72 divisors (see below), whose sum is σ = 292864320. Its totient is φ = 48254976.

The previous prime is 121450237. The next prime is 121450267. The reversal of 121450240 is 42054121.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 305722 + ... + 306118.

It is an arithmetic number, because the mean of its divisors is an integer number (4067560).

Almost surely, 2^121450240 is an apocalyptic number.

121450240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121450240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146432160).

121450240 is an abundant number, since it is smaller than the sum of its proper divisors (171414080).

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

121450240 is an equidigital number, since it uses as much as digits as its factorization.

121450240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 121450240 is about 11020.4464519365. The cubic root of 121450240 is about 495.2214633280.

The spelling of 121450240 in words is "one hundred twenty-one million, four hundred fifty thousand, two hundred forty".