405099 has 24 divisors (see below), whose sum is σ = 648960. Its totient is φ = 242352.

The previous prime is 405091. The next prime is 405143. The reversal of 405099 is 990504.

It is a happy number.

It is not a de Polignac number, because 405099 - 2³ = 405091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405091) 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 23 ways as a sum of consecutive naturals, for example, 3882 + ... + 3984.

It is an arithmetic number, because the mean of its divisors is an integer number (27040).

2⁴⁰⁵⁰⁹⁹ is an apocalyptic number.

405099 is a deficient number, since it is larger than the sum of its proper divisors (243861).

405099 is a wasteful number, since it uses less digits than its factorization.

405099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 405099 is about 636.4738800611. The cubic root of 405099 is about 73.9923902572.

The spelling of 405099 in words is "four hundred five thousand, ninety-nine".