381121 has 8 divisors (see below), whose sum is σ = 432320. Its totient is φ = 333072.

The previous prime is 381103. The next prime is 381167. The reversal of 381121 is 121183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381121 - 2¹¹ = 379073 is a prime.

It is a Duffinian number.

381121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 381095 and 381104.

It is not an unprimeable number, because it can be changed into a prime (381181) 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, 525 + ... + 1018.

It is an arithmetic number, because the mean of its divisors is an integer number (54040).

2³⁸¹¹²¹ is an apocalyptic number.

It is an amenable number.

381121 is a deficient number, since it is larger than the sum of its proper divisors (51199).

381121 is a wasteful number, since it uses less digits than its factorization.

381121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575.

The product of its digits is 48, while the sum is 16.

The square root of 381121 is about 617.3499817769. The cubic root of 381121 is about 72.5027188834.

The spelling of 381121 in words is "three hundred eighty-one thousand, one hundred twenty-one".