555545 has 4 divisors (see below), whose sum is σ = 666660. Its totient is φ = 444432.

The previous prime is 555523. The next prime is 555557. The reversal of 555545 is 545555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545555 = 5 ⋅109111.

It can be written as a sum of positive squares in 2 ways, for example, as 375769 + 179776 = 613^2 + 424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555545 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55550 + ... + 55559.

It is an arithmetic number, because the mean of its divisors is an integer number (166665).

2⁵⁵⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

555545 is a deficient number, since it is larger than the sum of its proper divisors (111115).

555545 is a wasteful number, since it uses less digits than its factorization.

555545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111114.

The product of its digits is 12500, while the sum is 29.

The square root of 555545 is about 745.3489115844. The cubic root of 555545 is about 82.2065484963.

The spelling of 555545 in words is "five hundred fifty-five thousand, five hundred forty-five".