121543238 has 8 divisors (see below), whose sum is σ = 184622880. Its totient is φ = 60002280.

The previous prime is 121543237. The next prime is 121543271. The reversal of 121543238 is 832345121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 121543238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121543237) 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, 384473 + ... + 384788.

It is an arithmetic number, because the mean of its divisors is an integer number (23077860).

Almost surely, 2^121543238 is an apocalyptic number.

121543238 is a deficient number, since it is larger than the sum of its proper divisors (63079642).

121543238 is an equidigital number, since it uses as much as digits as its factorization.

121543238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769342.

The product of its digits is 5760, while the sum is 29.

The square root of 121543238 is about 11024.6649835721. The cubic root of 121543238 is about 495.3478329301.

Adding to 121543238 its reverse (832345121), we get a palindrome (953888359).

The spelling of 121543238 in words is "one hundred twenty-one million, five hundred forty-three thousand, two hundred thirty-eight".