545641 has 2 divisors, whose sum is σ = 545642. Its totient is φ = 545640.

The previous prime is 545621. The next prime is 545647. The reversal of 545641 is 146545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385641 + 160000 = 621^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 545641 - 2⁵ = 545609 is a prime.

It is not a weakly prime, because it can be changed into another prime (545647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272820 + 272821.

It is an arithmetic number, because the mean of its divisors is an integer number (272821).

2⁵⁴⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

545641 is a deficient number, since it is larger than the sum of its proper divisors (1).

545641 is an equidigital number, since it uses as much as digits as its factorization.

545641 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 545641 is about 738.6751654144. The cubic root of 545641 is about 81.7151029250.

The spelling of 545641 in words is "five hundred forty-five thousand, six hundred forty-one".