405329 has 4 divisors (see below), whose sum is σ = 422976. Its totient is φ = 387684.

The previous prime is 405323. The next prime is 405341. The reversal of 405329 is 923504.

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 405329 - 2⁸ = 405073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 17623 = 405329 / (4 + 0 + 5 + 3 + 2 + 9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (405323) 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, 8789 + ... + 8834.

It is an arithmetic number, because the mean of its divisors is an integer number (105744).

2⁴⁰⁵³²⁹ is an apocalyptic number.

It is an amenable number.

405329 is a deficient number, since it is larger than the sum of its proper divisors (17647).

405329 is a wasteful number, since it uses less digits than its factorization.

405329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17646.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 405329 is about 636.6545374063. The cubic root of 405329 is about 74.0063909747.

The spelling of 405329 in words is "four hundred five thousand, three hundred twenty-nine".