654541 has 2 divisors, whose sum is σ = 654542. Its totient is φ = 654540.

The previous prime is 654539. The next prime is 654553. The reversal of 654541 is 145456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455625 + 198916 = 675^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 654541 - 2¹ = 654539 is a prime.

Together with 654539, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327270 + 327271.

It is an arithmetic number, because the mean of its divisors is an integer number (327271).

2⁶⁵⁴⁵⁴¹ is an apocalyptic number.

It is an amenable number.

654541 is a deficient number, since it is larger than the sum of its proper divisors (1).

654541 is an equidigital number, since it uses as much as digits as its factorization.

654541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 25.

The square root of 654541 is about 809.0370819684. The cubic root of 654541 is about 86.8251652489.

Adding to 654541 its reverse (145456), we get a palindrome (799997).

The spelling of 654541 in words is "six hundred fifty-four thousand, five hundred forty-one".