403405 has 4 divisors (see below), whose sum is σ = 484092. Its totient is φ = 322720.

The previous prime is 403391. The next prime is 403433. The reversal of 403405 is 504304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 316969 + 86436 = 563^2 + 294^2 .

It is not a de Polignac number, because 403405 - 2¹⁷ = 272333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40336 + ... + 40345.

It is an arithmetic number, because the mean of its divisors is an integer number (121023).

2⁴⁰³⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

403405 is a deficient number, since it is larger than the sum of its proper divisors (80687).

403405 is an equidigital number, since it uses as much as digits as its factorization.

403405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80686.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 403405 is about 635.1417164696. The cubic root of 403405 is about 73.8891083173.

Adding to 403405 its reverse (504304), we get a palindrome (907709).

It can be divided in two parts, 403 and 405, that added together give a palindrome (808).

The spelling of 403405 in words is "four hundred three thousand, four hundred five".