654420 has 48 divisors (see below), whose sum is σ = 1975680. Its totient is φ = 160896.

The previous prime is 654413. The next prime is 654421. The reversal of 654420 is 24456.

It is a happy number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 654420.

It is not an unprimeable number, because it can be changed into a prime (654421) by changing a digit.

654420 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 15 ways as a sum of consecutive naturals, for example, 361 + ... + 1199.

It is an arithmetic number, because the mean of its divisors is an integer number (41160).

2⁶⁵⁴⁴²⁰ is an apocalyptic number.

654420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987840).

654420 is an abundant number, since it is smaller than the sum of its proper divisors (1321260).

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

654420 is a wasteful number, since it uses less digits than its factorization.

654420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 654420 is about 808.9622982562. The cubic root of 654420 is about 86.8198146840.

Adding to 654420 its reverse (24456), we get a palindrome (678876).

The spelling of 654420 in words is "six hundred fifty-four thousand, four hundred twenty".