121580 has 12 divisors (see below), whose sum is σ = 255360. Its totient is φ = 48624.

The previous prime is 121579. The next prime is 121591. The reversal of 121580 is 85121.

121580 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3020 + ... + 3059.

It is an arithmetic number, because the mean of its divisors is an integer number (21280).

2¹²¹⁵⁸⁰ is an apocalyptic number.

121580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121580 is an abundant number, since it is smaller than the sum of its proper divisors (133780).

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

121580 is a wasteful number, since it uses less digits than its factorization.

121580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088 (or 6086 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 121580 is about 348.6832373373. The cubic root of 121580 is about 49.5397768908.

The spelling of 121580 in words is "one hundred twenty-one thousand, five hundred eighty".