121278144 has 56 divisors (see below), whose sum is σ = 345572080. Its totient is φ = 37315584.

The previous prime is 121278139. The next prime is 121278167. The reversal of 121278144 is 441872121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21799 + ... + 26790.

It is an arithmetic number, because the mean of its divisors is an integer number (6170930).

Almost surely, 2^121278144 is an apocalyptic number.

It is an amenable number.

121278144 is an abundant number, since it is smaller than the sum of its proper divisors (224293936).

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

121278144 is a wasteful number, since it uses less digits than its factorization.

121278144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48617 (or 48607 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 121278144 is about 11012.6356518319. The cubic root of 121278144 is about 494.9874417791.

The spelling of 121278144 in words is "one hundred twenty-one million, two hundred seventy-eight thousand, one hundred forty-four".