381642 has 8 divisors (see below), whose sum is σ = 763296. Its totient is φ = 127212.

The previous prime is 381637. The next prime is 381659. The reversal of 381642 is 246183.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

381642 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381642.

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, 31798 + ... + 31809.

It is an arithmetic number, because the mean of its divisors is an integer number (95412).

2³⁸¹⁶⁴² is an apocalyptic number.

381642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381642 is a wasteful number, since it uses less digits than its factorization.

381642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63612.

The product of its digits is 1152, while the sum is 24.

The square root of 381642 is about 617.7718025291. The cubic root of 381642 is about 72.5357413942.

The spelling of 381642 in words is "three hundred eighty-one thousand, six hundred forty-two".