565000421 has 2 divisors, whose sum is σ = 565000422. Its totient is φ = 565000420.

The previous prime is 565000411. The next prime is 565000439. The reversal of 565000421 is 124000565.

565000421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562211521 + 2788900 = 23711^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 565000421 - 2⁶ = 565000357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565000411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282500210 + 282500211.

It is an arithmetic number, because the mean of its divisors is an integer number (282500211).

Almost surely, 2^565000421 is an apocalyptic number.

It is an amenable number.

565000421 is a deficient number, since it is larger than the sum of its proper divisors (1).

565000421 is an equidigital number, since it uses as much as digits as its factorization.

565000421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 565000421 is about 23769.7375038093. The cubic root of 565000421 is about 826.7031462794.

Adding to 565000421 its reverse (124000565), we get a palindrome (689000986).

The spelling of 565000421 in words is "five hundred sixty-five million, four hundred twenty-one", and thus it is an aban number.