121140 has 36 divisors (see below), whose sum is σ = 368004. Its totient is φ = 32256.

The previous prime is 121139. The next prime is 121151. The reversal of 121140 is 41121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 41616 + 79524 = 204^2 + 282^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×121140³ = 5333152012632000, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157 + ... + 516.

2¹²¹¹⁴⁰ is an apocalyptic number.

121140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121140 is an abundant number, since it is smaller than the sum of its proper divisors (246864).

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

121140 is a wasteful number, since it uses less digits than its factorization.

121140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 121140 is about 348.0517202946. The cubic root of 121140 is about 49.4799428995.

Adding to 121140 its reverse (41121), we get a palindrome (162261).

The spelling of 121140 in words is "one hundred twenty-one thousand, one hundred forty", and thus it is an iban number.