121234240 has 56 divisors (see below), whose sum is σ = 289681920. Its totient is φ = 48327168.

The previous prime is 121234207. The next prime is 121234247. The reversal of 121234240 is 42432121.

121234240 = 291² + 292² + ... + 729².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121234247) 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 7 ways as a sum of consecutive naturals, for example, 140049 + ... + 140911.

Almost surely, 2^121234240 is an apocalyptic number.

121234240 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 121234240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144840960).

121234240 is an abundant number, since it is smaller than the sum of its proper divisors (168447680).

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

121234240 is an equidigital number, since it uses as much as digits as its factorization.

121234240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 121234240 is about 11010.6421247809. The cubic root of 121234240 is about 494.9277043006.

Adding to 121234240 its reverse (42432121), we get a palindrome (163666361).

The spelling of 121234240 in words is "one hundred twenty-one million, two hundred thirty-four thousand, two hundred forty".