121584280 has 32 divisors (see below), whose sum is σ = 274483440. Its totient is φ = 48470400.

The previous prime is 121584277. The next prime is 121584299. The reversal of 121584280 is 82485121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7330 + ... + 17230.

Almost surely, 2^121584280 is an apocalyptic number.

121584280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121584280 is an abundant number, since it is smaller than the sum of its proper divisors (152899160).

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

121584280 is a wasteful number, since it uses less digits than its factorization.

121584280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10219 (or 10215 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 121584280 is about 11026.5261982185. The cubic root of 121584280 is about 495.4035820287.

The spelling of 121584280 in words is "one hundred twenty-one million, five hundred eighty-four thousand, two hundred eighty".