394421 has 4 divisors (see below), whose sum is σ = 415200. Its totient is φ = 373644.

The previous prime is 394411. The next prime is 394453. The reversal of 394421 is 124493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 394421 - 2⁶ = 394357 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 (394411) 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, 10361 + ... + 10398.

It is an arithmetic number, because the mean of its divisors is an integer number (103800).

2³⁹⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

394421 is a deficient number, since it is larger than the sum of its proper divisors (20779).

394421 is a wasteful number, since it uses less digits than its factorization.

394421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778.

The product of its digits is 864, while the sum is 23.

The square root of 394421 is about 628.0294579078. The cubic root of 394421 is about 73.3364713992.

The spelling of 394421 in words is "three hundred ninety-four thousand, four hundred twenty-one".