605721481 has 2 divisors, whose sum is σ = 605721482. Its totient is φ = 605721480.

The previous prime is 605721469. The next prime is 605721497. The reversal of 605721481 is 184127506.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601034256 + 4687225 = 24516^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 605721481 - 2⁵ = 605721449 is a prime.

It is a super-2 number, since 2×605721481² = 733797025089666722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (605721421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302860740 + 302860741.

It is an arithmetic number, because the mean of its divisors is an integer number (302860741).

Almost surely, 2^605721481 is an apocalyptic number.

It is an amenable number.

605721481 is a deficient number, since it is larger than the sum of its proper divisors (1).

605721481 is an equidigital number, since it uses as much as digits as its factorization.

605721481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 605721481 is about 24611.4095695472. The cubic root of 605721481 is about 846.1051240768.

Adding to 605721481 its reverse (184127506), we get a palindrome (789848987).

The spelling of 605721481 in words is "six hundred five million, seven hundred twenty-one thousand, four hundred eighty-one".