654220 has 24 divisors (see below), whose sum is σ = 1570464. Its totient is φ = 224256.

The previous prime is 654209. The next prime is 654221. The reversal of 654220 is 22456.

654220 = T₁₂₄ + T₁₂₅ + ... + T₁₇₉.

It is a nialpdrome in base 10.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (654221) 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, 2197 + ... + 2476.

It is an arithmetic number, because the mean of its divisors is an integer number (65436).

2⁶⁵⁴²²⁰ is an apocalyptic number.

It is an amenable number.

654220 is an abundant number, since it is smaller than the sum of its proper divisors (916244).

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

654220 is a wasteful number, since it uses less digits than its factorization.

654220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4689 (or 4687 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 654220 is about 808.8386736550. The cubic root of 654220 is about 86.8109693287.

Adding to 654220 its reverse (22456), we get a palindrome (676676).

The spelling of 654220 in words is "six hundred fifty-four thousand, two hundred twenty".