655420 has 12 divisors (see below), whose sum is σ = 1376424. Its totient is φ = 262160.

The previous prime is 655399. The next prime is 655439. The reversal of 655420 is 24556.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 655391 and 655400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16366 + ... + 16405.

It is an arithmetic number, because the mean of its divisors is an integer number (114702).

2⁶⁵⁵⁴²⁰ is an apocalyptic number.

It is an amenable number.

655420 is an abundant number, since it is smaller than the sum of its proper divisors (721004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655420 is a wasteful number, since it uses less digits than its factorization.

655420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32780 (or 32778 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 655420 is about 809.5801380963. The cubic root of 655420 is about 86.8640144486.

Adding to 655420 its reverse (24556), we get a palindrome (679976).

It can be divided in two parts, 6 and 55420, that multiplied together give a triangular number (332520 = T₈₁₅).

The spelling of 655420 in words is "six hundred fifty-five thousand, four hundred twenty".