121534240 has 24 divisors (see below), whose sum is σ = 287125020. Its totient is φ = 48613632.

The previous prime is 121534219. The next prime is 121534249. The reversal of 121534240 is 42435121.

It can be written as a sum of positive squares in 2 ways, for example, as 121088016 + 446224 = 11004^2 + 668^2 .

It is not an unprimeable number, because it can be changed into a prime (121534249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379635 + ... + 379954.

Almost surely, 2^121534240 is an apocalyptic number.

121534240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121534240 is an abundant number, since it is smaller than the sum of its proper divisors (165590780).

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

121534240 is an equidigital number, since it uses as much as digits as its factorization.

121534240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759604 (or 759596 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 121534240 is about 11024.2568910562. The cubic root of 121534240 is about 495.3356088858.

Adding to 121534240 its reverse (42435121), we get a palindrome (163969361).

It can be divided in two parts, 121 and 534240, that added together give a square (534361 = 731²).

The spelling of 121534240 in words is "one hundred twenty-one million, five hundred thirty-four thousand, two hundred forty".