605142221 has 2 divisors, whose sum is σ = 605142222. Its totient is φ = 605142220.

The previous prime is 605142203. The next prime is 605142281. The reversal of 605142221 is 122241506.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 594676996 + 10465225 = 24386^2 + 3235^2 .

It is a cyclic number.

It is not a de Polignac number, because 605142221 - 2⁶ = 605142157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605142281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302571110 + 302571111.

It is an arithmetic number, because the mean of its divisors is an integer number (302571111).

Almost surely, 2^605142221 is an apocalyptic number.

It is an amenable number.

605142221 is a deficient number, since it is larger than the sum of its proper divisors (1).

605142221 is an equidigital number, since it uses as much as digits as its factorization.

605142221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 605142221 is about 24599.6386355572. The cubic root of 605142221 is about 845.8353239639.

Adding to 605142221 its reverse (122241506), we get a palindrome (727383727).

The spelling of 605142221 in words is "six hundred five million, one hundred forty-two thousand, two hundred twenty-one".