655445 has 16 divisors (see below), whose sum is σ = 916608. Its totient is φ = 440640.

The previous prime is 655439. The next prime is 655453. The reversal of 655445 is 544556.

It is not a de Polignac number, because 655445 - 2¹⁰ = 654421 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a zygodrome in base 4.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 655445.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1982 + ... + 2288.

It is an arithmetic number, because the mean of its divisors is an integer number (57288).

2⁶⁵⁵⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

655445 is a deficient number, since it is larger than the sum of its proper divisors (261163).

655445 is a wasteful number, since it uses less digits than its factorization.

655445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380.

The product of its digits is 12000, while the sum is 29.

The square root of 655445 is about 809.5955780512. The cubic root of 655445 is about 86.8651188665.

Subtracting from 655445 its reverse (544556), we obtain a square (110889 = 333²).

The spelling of 655445 in words is "six hundred fifty-five thousand, four hundred forty-five".