121435443 has 20 divisors (see below), whose sum is σ = 186310960. Its totient is φ = 78766992.

The previous prime is 121435439. The next prime is 121435453. The reversal of 121435443 is 344534121.

It is a happy number.

121435443 is a `hidden beast` number, since 1 + 214 + 3 + 5 + 443 = 666.

It is not a de Polignac number, because 121435443 - 2² = 121435439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121435453) 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 19 ways as a sum of consecutive naturals, for example, 17263 + ... + 23256.

It is an arithmetic number, because the mean of its divisors is an integer number (9315548).

Almost surely, 2^121435443 is an apocalyptic number.

121435443 is a deficient number, since it is larger than the sum of its proper divisors (64875517).

121435443 is an equidigital number, since it uses as much as digits as its factorization.

121435443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40568 (or 40559 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 121435443 is about 11019.7750884489. The cubic root of 121435443 is about 495.2013505926.

Adding to 121435443 its reverse (344534121), we get a palindrome (465969564).

The spelling of 121435443 in words is "one hundred twenty-one million, four hundred thirty-five thousand, four hundred forty-three".