121827520 has 56 divisors (see below), whose sum is σ = 299484288. Its totient is φ = 47155200.

The previous prime is 121827467. The next prime is 121827539. The reversal of 121827520 is 25728121.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3780 + ... + 16060.

Almost surely, 2^121827520 is an apocalyptic number.

121827520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121827520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149742144).

121827520 is an abundant number, since it is smaller than the sum of its proper divisors (177656768).

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

121827520 is a wasteful number, since it uses less digits than its factorization.

121827520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12329 (or 12319 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 121827520 is about 11037.5504528858. The cubic root of 121827520 is about 495.7337280483.

The spelling of 121827520 in words is "one hundred twenty-one million, eight hundred twenty-seven thousand, five hundred twenty".