394143 has 4 divisors (see below), whose sum is σ = 525528. Its totient is φ = 262760.

The previous prime is 394129. The next prime is 394153. The reversal of 394143 is 341493.

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 394143 - 2¹⁷ = 263071 is a prime.

It is a D-number.

394143 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394123) 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, 65688 + ... + 65693.

It is an arithmetic number, because the mean of its divisors is an integer number (131382).

2³⁹⁴¹⁴³ is an apocalyptic number.

394143 is a deficient number, since it is larger than the sum of its proper divisors (131385).

394143 is a wasteful number, since it uses less digits than its factorization.

394143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131384.

The product of its digits is 1296, while the sum is 24.

The square root of 394143 is about 627.8080916968. The cubic root of 394143 is about 73.3192374193.

Subtracting from 394143 its reverse (341493), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 394143 in words is "three hundred ninety-four thousand, one hundred forty-three".