655642 has 16 divisors (see below), whose sum is σ = 1072512. Its totient is φ = 298800.

The previous prime is 655637. The next prime is 655643. The reversal of 655642 is 246556.

It is a d-powerful number, because it can be written as 6⁴ + 5² + 6⁴ + 5⁸ + 4⁴ + 2¹⁸ .

It is a self number, because there is not a number n which added to its sum of digits gives 655642.

It is not an unprimeable number, because it can be changed into a prime (655643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3843 + ... + 4009.

It is an arithmetic number, because the mean of its divisors is an integer number (67032).

2⁶⁵⁵⁶⁴² is an apocalyptic number.

655642 is a deficient number, since it is larger than the sum of its proper divisors (416870).

655642 is a wasteful number, since it uses less digits than its factorization.

655642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333.

The product of its digits is 7200, while the sum is 28.

The square root of 655642 is about 809.7172345949. The cubic root of 655642 is about 86.8738206972.

The spelling of 655642 in words is "six hundred fifty-five thousand, six hundred forty-two".