405493 has 8 divisors (see below), whose sum is σ = 446976. Its totient is φ = 364800.

The previous prime is 405491. The next prime is 405497. The reversal of 405493 is 394504.

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 405493 - 2¹ = 405491 is a prime.

It is a Duffinian number.

405493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2005 + ... + 2197.

It is an arithmetic number, because the mean of its divisors is an integer number (55872).

2⁴⁰⁵⁴⁹³ is an apocalyptic number.

It is an amenable number.

405493 is a deficient number, since it is larger than the sum of its proper divisors (41483).

405493 is a wasteful number, since it uses less digits than its factorization.

405493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 405493 is about 636.7833226459. The cubic root of 405493 is about 74.0163708606.

Adding to 405493 its reverse (394504), we get a palindrome (799997).

It can be divided in two parts, 405 and 493, that added together give a palindrome (898).

The spelling of 405493 in words is "four hundred five thousand, four hundred ninety-three".