121430447 has 4 divisors (see below), whose sum is σ = 121530960. Its totient is φ = 121329936.

The previous prime is 121430423. The next prime is 121430459. The reversal of 121430447 is 744034121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121430447 - 2⁶ = 121430383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121430467) 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 3 ways as a sum of consecutive naturals, for example, 48422 + ... + 50867.

It is an arithmetic number, because the mean of its divisors is an integer number (30382740).

Almost surely, 2^121430447 is an apocalyptic number.

121430447 is a deficient number, since it is larger than the sum of its proper divisors (100513).

121430447 is an equidigital number, since it uses as much as digits as its factorization.

121430447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100512.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 121430447 is about 11019.5484027250. The cubic root of 121430447 is about 495.1945594400.

Adding to 121430447 its reverse (744034121), we get a palindrome (865464568).

The spelling of 121430447 in words is "one hundred twenty-one million, four hundred thirty thousand, four hundred forty-seven".