121380 has 72 divisors (see below), whose sum is σ = 412608. Its totient is φ = 26112.

The previous prime is 121379. The next prime is 121403. The reversal of 121380 is 83121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7132 + ... + 7148.

2¹²¹³⁸⁰ is an apocalyptic number.

121380 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 121380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206304).

121380 is an abundant number, since it is smaller than the sum of its proper divisors (291228).

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

121380 is a wasteful number, since it uses less digits than its factorization.

121380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 121380 is about 348.3963260426. The cubic root of 121380 is about 49.5125975487.

The spelling of 121380 in words is "one hundred twenty-one thousand, three hundred eighty".