406243 has 4 divisors (see below), whose sum is σ = 410080. Its totient is φ = 402408.

The previous prime is 406207. The next prime is 406247. The reversal of 406243 is 342604.

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 406243 - 2⁹ = 405731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406243.

It is not an unprimeable number, because it can be changed into a prime (406247) 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, 1755 + ... + 1972.

It is an arithmetic number, because the mean of its divisors is an integer number (102520).

2⁴⁰⁶²⁴³ is an apocalyptic number.

406243 is a deficient number, since it is larger than the sum of its proper divisors (3837).

406243 is a wasteful number, since it uses less digits than its factorization.

406243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 406243 is about 637.3719479237. The cubic root of 406243 is about 74.0619763237.

Adding to 406243 its reverse (342604), we get a palindrome (748847).

The spelling of 406243 in words is "four hundred six thousand, two hundred forty-three".