654020 has 24 divisors (see below), whose sum is σ = 1401624. Its totient is φ = 256256.

The previous prime is 654019. The next prime is 654023. The reversal of 654020 is 20456.

It can be written as a sum of positive squares in 4 ways, for example, as 10816 + 643204 = 104^2 + 802^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 654020.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 654020.

It is not an unprimeable number, because it can be changed into a prime (654023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752 + ... + 1368.

It is an arithmetic number, because the mean of its divisors is an integer number (58401).

2⁶⁵⁴⁰²⁰ is an apocalyptic number.

It is an amenable number.

654020 is an abundant number, since it is smaller than the sum of its proper divisors (747604).

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

654020 is a wasteful number, since it uses less digits than its factorization.

654020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 654020 is about 808.7150301559. The cubic root of 654020 is about 86.8021221706.

Adding to 654020 its reverse (20456), we get a palindrome (674476).

The spelling of 654020 in words is "six hundred fifty-four thousand, twenty".