121450280 has 128 divisors (see below), whose sum is σ = 338169600. Its totient is φ = 38320128.

The previous prime is 121450271. The next prime is 121450291. The reversal of 121450280 is 82054121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196532 + ... + 197148.

It is an arithmetic number, because the mean of its divisors is an integer number (2641950).

Almost surely, 2^121450280 is an apocalyptic number.

121450280 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 121450280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169084800).

121450280 is an abundant number, since it is smaller than the sum of its proper divisors (216719320).

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

121450280 is a wasteful number, since it uses less digits than its factorization.

121450280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 121450280 is about 11020.4482667449. The cubic root of 121450280 is about 495.2215176955.

The spelling of 121450280 in words is "one hundred twenty-one million, four hundred fifty thousand, two hundred eighty".