121543404 has 24 divisors (see below), whose sum is σ = 300284208. Its totient is φ = 38131200.

The previous prime is 121543403. The next prime is 121543441. The reversal of 121543404 is 404345121.

It is not an unprimeable number, because it can be changed into a prime (121543403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297697 + ... + 298104.

It is an arithmetic number, because the mean of its divisors is an integer number (12511842).

Almost surely, 2^121543404 is an apocalyptic number.

It is an amenable number.

121543404 is an abundant number, since it is smaller than the sum of its proper divisors (178740804).

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

121543404 is a wasteful number, since it uses less digits than its factorization.

121543404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595825 (or 595823 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 121543404 is about 11024.6725121429. The cubic root of 121543404 is about 495.3480584403.

Adding to 121543404 its reverse (404345121), we get a palindrome (525888525).

The spelling of 121543404 in words is "one hundred twenty-one million, five hundred forty-three thousand, four hundred four".