121347280 has 40 divisors (see below), whose sum is σ = 282997512. Its totient is φ = 48390144.

The previous prime is 121347277. The next prime is 121347301. The reversal of 121347280 is 82743121.

It can be written as a sum of positive squares in 4 ways, for example, as 10086976 + 111260304 = 3176^2 + 10548^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 26092 + ... + 30388.

Almost surely, 2^121347280 is an apocalyptic number.

121347280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121347280 is an abundant number, since it is smaller than the sum of its proper divisors (161650232).

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

121347280 is a wasteful number, since it uses less digits than its factorization.

121347280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663 (or 4657 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 121347280 is about 11015.7741443804. The cubic root of 121347280 is about 495.0814816721.

The spelling of 121347280 in words is "one hundred twenty-one million, three hundred forty-seven thousand, two hundred eighty".