405449 has 16 divisors (see below), whose sum is σ = 483840. Its totient is φ = 336000.

The previous prime is 405439. The next prime is 405473. The reversal of 405449 is 944504.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405449 is a prime.

It is a Duffinian 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9869 + ... + 9909.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2⁴⁰⁵⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

405449 is a deficient number, since it is larger than the sum of its proper divisors (78391).

405449 is a wasteful number, since it uses less digits than its factorization.

405449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 405449 is about 636.7487730652. The cubic root of 405449 is about 74.0136935944.

The spelling of 405449 in words is "four hundred five thousand, four hundred forty-nine".