655505 has 4 divisors (see below), whose sum is σ = 786612. Its totient is φ = 524400.

The previous prime is 655489. The next prime is 655507. The reversal of 655505 is 505556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 261121 + 394384 = 511^2 + 628^2 .

It is not a de Polignac number, because 655505 - 2⁴ = 655489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65546 + ... + 65555.

It is an arithmetic number, because the mean of its divisors is an integer number (196653).

2⁶⁵⁵⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

655505 is a deficient number, since it is larger than the sum of its proper divisors (131107).

655505 is a wasteful number, since it uses less digits than its factorization.

655505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131106.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 655505 is about 809.6326327415. The cubic root of 655505 is about 86.8677693549.

The spelling of 655505 in words is "six hundred fifty-five thousand, five hundred five".