405079 has 4 divisors (see below), whose sum is σ = 412776. Its totient is φ = 397384.

The previous prime is 405073. The next prime is 405089. The reversal of 405079 is 970504.

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

It is a cyclic number.

It is not a de Polignac number, because 405079 - 2³ = 405071 is a prime.

It is a Duffinian number.

405079 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405071) 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 3 ways as a sum of consecutive naturals, for example, 3769 + ... + 3874.

It is an arithmetic number, because the mean of its divisors is an integer number (103194).

2⁴⁰⁵⁰⁷⁹ is an apocalyptic number.

405079 is a deficient number, since it is larger than the sum of its proper divisors (7697).

405079 is an equidigital number, since it uses as much as digits as its factorization.

405079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 405079 is about 636.4581683033. The cubic root of 405079 is about 73.9911725531.

The spelling of 405079 in words is "four hundred five thousand, seventy-nine".