121575428 has 48 divisors (see below), whose sum is σ = 241145856. Its totient is φ = 53239680.

The previous prime is 121575427. The next prime is 121575463. The reversal of 121575428 is 824575121.

It is not an unprimeable number, because it can be changed into a prime (121575427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84725 + ... + 86147.

It is an arithmetic number, because the mean of its divisors is an integer number (5023872).

Almost surely, 2^121575428 is an apocalyptic number.

It is an amenable number.

121575428 is a deficient number, since it is larger than the sum of its proper divisors (119570428).

121575428 is a wasteful number, since it uses less digits than its factorization.

121575428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524 (or 1522 counting only the distinct ones).

The product of its digits is 22400, while the sum is 35.

The square root of 121575428 is about 11026.1247952306. The cubic root of 121575428 is about 495.3915590409.

The spelling of 121575428 in words is "one hundred twenty-one million, five hundred seventy-five thousand, four hundred twenty-eight".