562721 has 2 divisors, whose sum is σ = 562722. Its totient is φ = 562720.

The previous prime is 562711. The next prime is 562739. The reversal of 562721 is 127265.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541696 + 21025 = 736^2 + 145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-562721 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (562711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281360 + 281361.

It is an arithmetic number, because the mean of its divisors is an integer number (281361).

2⁵⁶²⁷²¹ is an apocalyptic number.

It is an amenable number.

562721 is a deficient number, since it is larger than the sum of its proper divisors (1).

562721 is an equidigital number, since it uses as much as digits as its factorization.

562721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 23.

The square root of 562721 is about 750.1473188648. The cubic root of 562721 is about 82.5589905613.

Adding to 562721 its reverse (127265), we get a palindrome (689986).

It can be divided in two parts, 5 and 62721, that added together give a palindrome (62726).

The spelling of 562721 in words is "five hundred sixty-two thousand, seven hundred twenty-one".