655545 has 32 divisors (see below), whose sum is σ = 1192320. Its totient is φ = 304640.

The previous prime is 655541. The next prime is 655547. The reversal of 655545 is 545556.

It is not a de Polignac number, because 655545 - 2² = 655541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (655541) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4717 + ... + 4853.

It is an arithmetic number, because the mean of its divisors is an integer number (37260).

2⁶⁵⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

655545 is a deficient number, since it is larger than the sum of its proper divisors (536775).

655545 is a wasteful number, since it uses less digits than its factorization.

655545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185.

The product of its digits is 15000, while the sum is 30.

The square root of 655545 is about 809.6573349263. The cubic root of 655545 is about 86.8695362573.

The spelling of 655545 in words is "six hundred fifty-five thousand, five hundred forty-five".