381427 has 4 divisors (see below), whose sum is σ = 383616. Its totient is φ = 379240.

The previous prime is 381419. The next prime is 381439. The reversal of 381427 is 724183.

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

It is a cyclic number.

It is not a de Polignac number, because 381427 - 2³ = 381419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381467) 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, 808 + ... + 1189.

It is an arithmetic number, because the mean of its divisors is an integer number (95904).

2³⁸¹⁴²⁷ is an apocalyptic number.

381427 is a deficient number, since it is larger than the sum of its proper divisors (2189).

381427 is a wasteful number, since it uses less digits than its factorization.

381427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188.

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

The square root of 381427 is about 617.5977655400. The cubic root of 381427 is about 72.5221177068.

Subtracting from 381427 its product of digits (1344), we obtain a palindrome (380083).

It can be divided in two parts, 381 and 427, that added together give a palindrome (808).

The spelling of 381427 in words is "three hundred eighty-one thousand, four hundred twenty-seven".