654481 has 3 divisors (see below), whose sum is σ = 655291. Its totient is φ = 653672.

The previous prime is 654439. The next prime is 654491. The reversal of 654481 is 184456.

The square root of 654481 is 809.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 576081 + 78400 = 759^2 + 280^2 .

It is not a de Polignac number, because 654481 - 2⁹ = 653969 is a prime.

It is a super-2 number, since 2×654481² = 856690758722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654421) 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 2 ways as a sum of consecutive naturals, for example, 405 + ... + 1213.

654481 is a Friedman number, since it can be written as (814-5)^(6-4), using all its digits and the basic arithmetic operations.

2⁶⁵⁴⁴⁸¹ is an apocalyptic number.

654481 is the 809-th square number.

654481 is the 405-th centered octagonal number.

It is an amenable number.

654481 is a deficient number, since it is larger than the sum of its proper divisors (810).

654481 is an frugal number, since it uses more digits than its factorization.

654481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 809 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The cubic root of 654481 is about 86.8225121587.

The spelling of 654481 in words is "six hundred fifty-four thousand, four hundred eighty-one".