121281528 has 16 divisors (see below), whose sum is σ = 303203880. Its totient is φ = 40427168.

The previous prime is 121281499. The next prime is 121281547. The reversal of 121281528 is 825182121.

It is a junction number, because it is equal to n+sod(n) for n = 121281495 and 121281504.

It is a congruent number.

It is an unprimeable number.

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, 2526675 + ... + 2526722.

Almost surely, 2^121281528 is an apocalyptic number.

It is an amenable number.

121281528 is an abundant number, since it is smaller than the sum of its proper divisors (181922352).

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

121281528 is a wasteful number, since it uses less digits than its factorization.

121281528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5053406 (or 5053402 counting only the distinct ones).

The product of its digits is 2560, while the sum is 30.

The square root of 121281528 is about 11012.7892924545. The cubic root of 121281528 is about 494.9920455818.

The spelling of 121281528 in words is "one hundred twenty-one million, two hundred eighty-one thousand, five hundred twenty-eight".