555009 has 32 divisors (see below), whose sum is σ = 967680. Its totient is φ = 274752.

The previous prime is 554977. The next prime is 555029. The reversal of 555009 is 900555.

It is not a de Polignac number, because 555009 - 2⁵ = 554977 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 555009.

It is not an unprimeable number, because it can be changed into a prime (555029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5134 + ... + 5240.

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

It is a Proth number, since it is equal to 271 ⋅ 2¹¹ + 1 and 271 < 2¹¹.

2⁵⁵⁵⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

555009 is a deficient number, since it is larger than the sum of its proper divisors (412671).

555009 is a wasteful number, since it uses less digits than its factorization.

555009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149.

The product of its (nonzero) digits is 1125, while the sum is 24.

The square root of 555009 is about 744.9892616676. The cubic root of 555009 is about 82.1801018607.

It can be divided in two parts, 55500 and 9, that multiplied together give a triangular number (499500 = T₉₉₉).

The spelling of 555009 in words is "five hundred fifty-five thousand, nine".