381361 has 4 divisors (see below), whose sum is σ = 403812. Its totient is φ = 358912.

The previous prime is 381347. The next prime is 381371. The reversal of 381361 is 163183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 323761 + 57600 = 569^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 381361 - 2⁷ = 381233 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11200 + ... + 11233.

It is an arithmetic number, because the mean of its divisors is an integer number (100953).

2³⁸¹³⁶¹ is an apocalyptic number.

It is an amenable number.

381361 is a deficient number, since it is larger than the sum of its proper divisors (22451).

381361 is a wasteful number, since it uses less digits than its factorization.

381361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22450.

The product of its digits is 432, while the sum is 22.

The square root of 381361 is about 617.5443303926. The cubic root of 381361 is about 72.5179345247.

The spelling of 381361 in words is "three hundred eighty-one thousand, three hundred sixty-one".