550405 has 16 divisors (see below), whose sum is σ = 705024. Its totient is φ = 411840.

The previous prime is 550379. The next prime is 550427. The reversal of 550405 is 504055.

It is a happy number.

It is not a de Polignac number, because 550405 - 2¹⁵ = 517637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8182 + ... + 8248.

It is an arithmetic number, because the mean of its divisors is an integer number (44064).

2⁵⁵⁰⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

550405 is a deficient number, since it is larger than the sum of its proper divisors (154619).

550405 is a wasteful number, since it uses less digits than its factorization.

550405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 550405 is about 741.8928494062. The cubic root of 550405 is about 81.9522327388.

The spelling of 550405 in words is "five hundred fifty thousand, four hundred five".