381266 has 4 divisors (see below), whose sum is σ = 571902. Its totient is φ = 190632.

The previous prime is 381253. The next prime is 381287. The reversal of 381266 is 662183.

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

It can be written as a sum of positive squares in only one way, i.e., 326041 + 55225 = 571^2 + 235^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95315 + ... + 95318.

2³⁸¹²⁶⁶ is an apocalyptic number.

381266 is a deficient number, since it is larger than the sum of its proper divisors (190636).

381266 is a wasteful number, since it uses less digits than its factorization.

381266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190635.

The product of its digits is 1728, while the sum is 26.

The square root of 381266 is about 617.4674080468. The cubic root of 381266 is about 72.5119124302.

The spelling of 381266 in words is "three hundred eighty-one thousand, two hundred sixty-six".