121458240 has 168 divisors, whose sum is σ = 421876728. Its totient is φ = 32071680.

The previous prime is 121458229. The next prime is 121458247. The reversal of 121458240 is 42854121.

It can be written as a sum of positive squares in 4 ways, for example, as 3779136 + 117679104 = 1944^2 + 10848^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121458247) 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, 521164 + ... + 521396.

It is an arithmetic number, because the mean of its divisors is an integer number (2511171).

Almost surely, 2^121458240 is an apocalyptic number.

121458240 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 121458240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210938364).

121458240 is an abundant number, since it is smaller than the sum of its proper divisors (300418488).

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

121458240 is a wasteful number, since it uses less digits than its factorization.

121458240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 121458240 is about 11020.8094076615. The cubic root of 121458240 is about 495.2323366006.

The spelling of 121458240 in words is "one hundred twenty-one million, four hundred fifty-eight thousand, two hundred forty".