121566480 has 120 divisors (see below), whose sum is σ = 432299712. Its totient is φ = 27683328.

The previous prime is 121566457. The next prime is 121566509. The reversal of 121566480 is 84665121.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 451786 + ... + 452054.

Almost surely, 2^121566480 is an apocalyptic number.

121566480 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 121566480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216149856).

121566480 is an abundant number, since it is smaller than the sum of its proper divisors (310733232).

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

121566480 is an equidigital number, since it uses as much as digits as its factorization.

121566480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 121566480 is about 11025.7190241725. The cubic root of 121566480 is about 495.3794050706.

The spelling of 121566480 in words is "one hundred twenty-one million, five hundred sixty-six thousand, four hundred eighty".