121573680 has 80 divisors (see below), whose sum is σ = 377949024. Its totient is φ = 32327680.

The previous prime is 121573667. The next prime is 121573691. The reversal of 121573680 is 86375121.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147670 + ... + 148490.

Almost surely, 2^121573680 is an apocalyptic number.

121573680 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 121573680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188974512).

121573680 is an abundant number, since it is smaller than the sum of its proper divisors (256375344).

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

121573680 is a wasteful number, since it uses less digits than its factorization.

121573680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454 (or 1448 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 121573680 is about 11026.0455286562. The cubic root of 121573680 is about 495.3891847986.

The spelling of 121573680 in words is "one hundred twenty-one million, five hundred seventy-three thousand, six hundred eighty".