120381 has 4 divisors (see below), whose sum is σ = 160512. Its totient is φ = 80252.

The previous prime is 120371. The next prime is 120383. The reversal of 120381 is 183021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183021 = 3 ⋅61007.

It is a cyclic number.

It is not a de Polignac number, because 120381 - 2⁵ = 120349 is a prime.

It is a super-2 number, since 2×120381² = 28983170322, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 120381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120383) by changing a digit.

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, 20061 + ... + 20066.

It is an arithmetic number, because the mean of its divisors is an integer number (40128).

2¹²⁰³⁸¹ is an apocalyptic number.

It is an amenable number.

120381 is a deficient number, since it is larger than the sum of its proper divisors (40131).

120381 is an equidigital number, since it uses as much as digits as its factorization.

120381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40130.

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

The square root of 120381 is about 346.9596518329. The cubic root of 120381 is about 49.3763878262.

The spelling of 120381 in words is "one hundred twenty thousand, three hundred eighty-one".