405263 has 8 divisors (see below), whose sum is σ = 443520. Its totient is φ = 368640.

The previous prime is 405253. The next prime is 405269. The reversal of 405263 is 362504.

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 405263 - 2⁴ = 405247 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 405263.

It is not an unprimeable number, because it can be changed into a prime (405269) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 143 + ... + 911.

It is an arithmetic number, because the mean of its divisors is an integer number (55440).

2⁴⁰⁵²⁶³ is an apocalyptic number.

405263 is a deficient number, since it is larger than the sum of its proper divisors (38257).

405263 is a wasteful number, since it uses less digits than its factorization.

405263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 405263 is about 636.6027018479. The cubic root of 405263 is about 74.0023739195.

Adding to 405263 its reverse (362504), we get a palindrome (767767).

The spelling of 405263 in words is "four hundred five thousand, two hundred sixty-three".