121448279 has 4 divisors (see below), whose sum is σ = 121844184. Its totient is φ = 121052376.

The previous prime is 121448267. The next prime is 121448309. The reversal of 121448279 is 972844121.

It is a happy number.

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 121448279 - 2⁴ = 121448263 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 (121448479) 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, 197492 + ... + 198105.

It is an arithmetic number, because the mean of its divisors is an integer number (30461046).

Almost surely, 2^121448279 is an apocalyptic number.

121448279 is a deficient number, since it is larger than the sum of its proper divisors (395905).

121448279 is an equidigital number, since it uses as much as digits as its factorization.

121448279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395904.

The product of its digits is 32256, while the sum is 38.

The square root of 121448279 is about 11020.3574805902. The cubic root of 121448279 is about 495.2187979442.

The spelling of 121448279 in words is "one hundred twenty-one million, four hundred forty-eight thousand, two hundred seventy-nine".