121597428 has 12 divisors (see below), whose sum is σ = 283727360. Its totient is φ = 40532472.

The previous prime is 121597417. The next prime is 121597433. The reversal of 121597428 is 824795121.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5066548 + ... + 5066571.

Almost surely, 2^121597428 is an apocalyptic number.

It is an amenable number.

121597428 is an abundant number, since it is smaller than the sum of its proper divisors (162129932).

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

121597428 is a wasteful number, since it uses less digits than its factorization.

121597428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10133126 (or 10133124 counting only the distinct ones).

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

The square root of 121597428 is about 11027.1223807483. The cubic root of 121597428 is about 495.4214388644.

The spelling of 121597428 in words is "one hundred twenty-one million, five hundred ninety-seven thousand, four hundred twenty-eight".