381247 has 4 divisors (see below), whose sum is σ = 382536. Its totient is φ = 379960.

The previous prime is 381239. The next prime is 381253. The reversal of 381247 is 742183.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 381247 - 2³ = 381239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381287) 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, 48 + ... + 874.

It is an arithmetic number, because the mean of its divisors is an integer number (95634).

2³⁸¹²⁴⁷ is an apocalyptic number.

381247 is a deficient number, since it is larger than the sum of its proper divisors (1289).

381247 is an equidigital number, since it uses as much as digits as its factorization.

381247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288.

The product of its digits is 1344, while the sum is 25.

The square root of 381247 is about 617.4520224277. The cubic root of 381247 is about 72.5107078913.

The spelling of 381247 in words is "three hundred eighty-one thousand, two hundred forty-seven".