394401 has 12 divisors (see below), whose sum is σ = 611952. Its totient is φ = 225288.

The previous prime is 394393. The next prime is 394409. The reversal of 394401 is 104493.

It is an interprime number because it is at equal distance from previous prime (394393) and next prime (394409).

It is not a de Polignac number, because 394401 - 2³ = 394393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

394401 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (394409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1195 + ... + 1488.

It is an arithmetic number, because the mean of its divisors is an integer number (50996).

2³⁹⁴⁴⁰¹ is an apocalyptic number.

It is an amenable number.

394401 is a deficient number, since it is larger than the sum of its proper divisors (217551).

394401 is a wasteful number, since it uses less digits than its factorization.

394401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 394401 is about 628.0135348860. The cubic root of 394401 is about 73.3352318149.

394401 divided by its sum of digits (21) gives a palindrome (18781).

Adding to 394401 its reverse (104493), we get a palindrome (498894).

The spelling of 394401 in words is "three hundred ninety-four thousand, four hundred one".