655129 has 8 divisors (see below), whose sum is σ = 703080. Its totient is φ = 608256.

The previous prime is 655121. The next prime is 655157. The reversal of 655129 is 921556.

It can be written as a sum of positive squares in 4 ways, for example, as 15129 + 640000 = 123^2 + 800^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655129 - 2³ = 655121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 655097 and 655106.

It is not an unprimeable number, because it can be changed into a prime (655121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297 + ... + 1729.

It is an arithmetic number, because the mean of its divisors is an integer number (87885).

2⁶⁵⁵¹²⁹ is an apocalyptic number.

655129 is the 433-rd nonagonal number.

It is an amenable number.

655129 is a deficient number, since it is larger than the sum of its proper divisors (47951).

655129 is a wasteful number, since it uses less digits than its factorization.

655129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539.

The product of its digits is 2700, while the sum is 28.

The square root of 655129 is about 809.4003953545. The cubic root of 655129 is about 86.8511569577.

It can be divided in two parts, 655 and 129, that added together give a square (784 = 28²).

The spelling of 655129 in words is "six hundred fifty-five thousand, one hundred twenty-nine".