655772 has 12 divisors (see below), whose sum is σ = 1235976. Its totient is φ = 302640.

The previous prime is 655757. The next prime is 655807. The reversal of 655772 is 277556.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6254 + ... + 6357.

It is an arithmetic number, because the mean of its divisors is an integer number (102998).

2⁶⁵⁵⁷⁷² is an apocalyptic number.

It is an amenable number.

655772 is a deficient number, since it is larger than the sum of its proper divisors (580204).

655772 is a wasteful number, since it uses less digits than its factorization.

655772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12628 (or 12626 counting only the distinct ones).

The product of its digits is 14700, while the sum is 32.

The square root of 655772 is about 809.7975055531. The cubic root of 655772 is about 86.8795620674.

The spelling of 655772 in words is "six hundred fifty-five thousand, seven hundred seventy-two".