605500121 has 2 divisors, whose sum is σ = 605500122. Its totient is φ = 605500120.

The previous prime is 605500111. The next prime is 605500171. The reversal of 605500121 is 121005506.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397563721 + 207936400 = 19939^2 + 14420^2 .

It is a cyclic number.

It is not a de Polignac number, because 605500121 - 2⁶ = 605500057 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 605500093 and 605500102.

It is not a weakly prime, because it can be changed into another prime (605500111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302750060 + 302750061.

It is an arithmetic number, because the mean of its divisors is an integer number (302750061).

Almost surely, 2^605500121 is an apocalyptic number.

It is an amenable number.

605500121 is a deficient number, since it is larger than the sum of its proper divisors (1).

605500121 is an equidigital number, since it uses as much as digits as its factorization.

605500121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 605500121 is about 24606.9120573875. The cubic root of 605500121 is about 846.0020422390.

Adding to 605500121 its reverse (121005506), we get a palindrome (726505627).

The spelling of 605500121 in words is "six hundred five million, five hundred thousand, one hundred twenty-one".