405469 has 4 divisors (see below), whose sum is σ = 414144. Its totient is φ = 396796.

The previous prime is 405439. The next prime is 405473. The reversal of 405469 is 964504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405469 - 2⁵ = 405437 is a prime.

It is a super-2 number, since 2×405469² = 328810219922, which contains 22 as substring.

It is a Duffinian number.

405469 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405439) 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 3 ways as a sum of consecutive naturals, for example, 4267 + ... + 4360.

It is an arithmetic number, because the mean of its divisors is an integer number (103536).

2⁴⁰⁵⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

405469 is a deficient number, since it is larger than the sum of its proper divisors (8675).

405469 is an equidigital number, since it uses as much as digits as its factorization.

405469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8674.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 405469 is about 636.7644776525. The cubic root of 405469 is about 74.0149105576.

The spelling of 405469 in words is "four hundred five thousand, four hundred sixty-nine".