381641 has 8 divisors (see below), whose sum is σ = 424704. Its totient is φ = 340560.

The previous prime is 381637. The next prime is 381659. The reversal of 381641 is 146183.

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

It is a cyclic number.

It is not a de Polignac number, because 381641 - 2² = 381637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71 + ... + 876.

It is an arithmetic number, because the mean of its divisors is an integer number (53088).

2³⁸¹⁶⁴¹ is an apocalyptic number.

381641 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

381641 is a deficient number, since it is larger than the sum of its proper divisors (43063).

381641 is a wasteful number, since it uses less digits than its factorization.

381641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its digits is 576, while the sum is 23.

The square root of 381641 is about 617.7709931682. The cubic root of 381641 is about 72.5356780400.

The spelling of 381641 in words is "three hundred eighty-one thousand, six hundred forty-one".