121387580 has 24 divisors (see below), whose sum is σ = 268331280. Its totient is φ = 45999360.

The previous prime is 121387579. The next prime is 121387589. The reversal of 121387580 is 85783121.

It is a self number, because there is not a number n which added to its sum of digits gives 121387580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121387589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159341 + ... + 160100.

It is an arithmetic number, because the mean of its divisors is an integer number (11180470).

Almost surely, 2^121387580 is an apocalyptic number.

121387580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121387580 is an abundant number, since it is smaller than the sum of its proper divisors (146943700).

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

121387580 is a wasteful number, since it uses less digits than its factorization.

121387580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319469 (or 319467 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 121387580 is about 11017.6031876266. The cubic root of 121387580 is about 495.1362818990.

The spelling of 121387580 in words is "one hundred twenty-one million, three hundred eighty-seven thousand, five hundred eighty".