381245 has 4 divisors (see below), whose sum is σ = 457500. Its totient is φ = 304992.

The previous prime is 381239. The next prime is 381253. The reversal of 381245 is 542183.

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 182329 + 198916 = 427^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 381245 - 2⁶ = 381181 is a prime.

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 381245.

It is a congruent number.

It is an unprimeable number.

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, 38120 + ... + 38129.

It is an arithmetic number, because the mean of its divisors is an integer number (114375).

2³⁸¹²⁴⁵ is an apocalyptic number.

It is an amenable number.

381245 is a deficient number, since it is larger than the sum of its proper divisors (76255).

381245 is an equidigital number, since it uses as much as digits as its factorization.

381245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76254.

The product of its digits is 960, while the sum is 23.

The square root of 381245 is about 617.4504028665. The cubic root of 381245 is about 72.5105810954.

It can be divided in two parts, 381 and 245, that added together give a palindrome (626).

The spelling of 381245 in words is "three hundred eighty-one thousand, two hundred forty-five".