121532840 has 64 divisors (see below), whose sum is σ = 321269760. Its totient is φ = 40792320.

The previous prime is 121532821. The next prime is 121532857. The reversal of 121532840 is 48235121.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4904 + ... + 16343.

It is an arithmetic number, because the mean of its divisors is an integer number (5019840).

Almost surely, 2^121532840 is an apocalyptic number.

121532840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121532840 is an abundant number, since it is smaller than the sum of its proper divisors (199736920).

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

121532840 is a wasteful number, since it uses less digits than its factorization.

121532840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21282 (or 21278 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 121532840 is about 11024.1933945301. The cubic root of 121532840 is about 495.3337068909. Note that the first 3 decimals are identical.

Adding to 121532840 its reverse (48235121), we get a palindrome (169767961).

The spelling of 121532840 in words is "one hundred twenty-one million, five hundred thirty-two thousand, eight hundred forty".