813541 has 2 divisors, whose sum is σ = 813542. Its totient is φ = 813540.

The previous prime is 813529. The next prime is 813559. The reversal of 813541 is 145318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 568516 + 245025 = 754^2 + 495^2 .

It is a cyclic number.

It is not a de Polignac number, because 813541 - 2¹¹ = 811493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813511) 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 as a sum of consecutive naturals, namely, 406770 + 406771.

It is an arithmetic number, because the mean of its divisors is an integer number (406771).

2⁸¹³⁵⁴¹ is an apocalyptic number.

It is an amenable number.

813541 is a deficient number, since it is larger than the sum of its proper divisors (1).

813541 is an equidigital number, since it uses as much as digits as its factorization.

813541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 813541 is about 901.9650769293. The cubic root of 813541 is about 93.3526136473.

Adding to 813541 its reverse (145318), we get a palindrome (958859).

The spelling of 813541 in words is "eight hundred thirteen thousand, five hundred forty-one".