655525 has 12 divisors (see below), whose sum is σ = 875812. Its totient is φ = 483840.

The previous prime is 655517. The next prime is 655531. The reversal of 655525 is 525556.

It can be written as a sum of positive squares in 6 ways, for example, as 13924 + 641601 = 118^2 + 801^2 .

It is not a de Polignac number, because 655525 - 2³ = 655517 is a prime.

It is a Duffinian number.

655525 is a lucky number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 655493 and 655502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 684 + ... + 1333.

2⁶⁵⁵⁵²⁵ is an apocalyptic number.

655525 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

655525 is a deficient number, since it is larger than the sum of its proper divisors (220287).

655525 is a wasteful number, since it uses less digits than its factorization.

655525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040 (or 2035 counting only the distinct ones).

The product of its digits is 7500, while the sum is 28.

The square root of 655525 is about 809.6449839281. The cubic root of 655525 is about 86.8686528151.

Subtracting from 655525 its product of digits (7500), we obtain a square (648025 = 805²).

The spelling of 655525 in words is "six hundred fifty-five thousand, five hundred twenty-five".