381265 has 4 divisors (see below), whose sum is σ = 457524. Its totient is φ = 305008.

The previous prime is 381253. The next prime is 381287. The reversal of 381265 is 562183.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562183 = 223 ⋅2521.

It can be written as a sum of positive squares in 2 ways, for example, as 123201 + 258064 = 351^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 381265 - 2⁵ = 381233 is a prime.

It is a Duffinian number.

381265 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38122 + ... + 38131.

It is an arithmetic number, because the mean of its divisors is an integer number (114381).

2³⁸¹²⁶⁵ is an apocalyptic number.

It is an amenable number.

381265 is a deficient number, since it is larger than the sum of its proper divisors (76259).

381265 is an equidigital number, since it uses as much as digits as its factorization.

381265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76258.

The product of its digits is 1440, while the sum is 25.

The square root of 381265 is about 617.4665982869. The cubic root of 381265 is about 72.5118490344.

It can be divided in two parts, 381 and 265, that added together give a palindrome (646).

The spelling of 381265 in words is "three hundred eighty-one thousand, two hundred sixty-five".