121975428 has 12 divisors (see below), whose sum is σ = 284609360. Its totient is φ = 40658472.

The previous prime is 121975411. The next prime is 121975429. The reversal of 121975428 is 824579121.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (121975429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5082298 + ... + 5082321.

Almost surely, 2^121975428 is an apocalyptic number.

It is an amenable number.

121975428 is an abundant number, since it is smaller than the sum of its proper divisors (162633932).

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

121975428 is a wasteful number, since it uses less digits than its factorization.

121975428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10164626 (or 10164624 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 121975428 is about 11044.2486389976. The cubic root of 121975428 is about 495.9342665664.

The spelling of 121975428 in words is "one hundred twenty-one million, nine hundred seventy-five thousand, four hundred twenty-eight".