4251274721 has 2 divisors, whose sum is σ = 4251274722. Its totient is φ = 4251274720.

The previous prime is 4251274717. The next prime is 4251274777. The reversal of 4251274721 is 1274721524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3660250000 + 591024721 = 60500^2 + 24311^2 .

It is a cyclic number.

It is not a de Polignac number, because 4251274721 - 2² = 4251274717 is a prime.

It is not a weakly prime, because it can be changed into another prime (4251234721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2125637360 + 2125637361.

It is an arithmetic number, because the mean of its divisors is an integer number (2125637361).

Almost surely, 2^4251274721 is an apocalyptic number.

It is an amenable number.

4251274721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4251274721 is an equidigital number, since it uses as much as digits as its factorization.

4251274721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31360, while the sum is 35.

The square root of 4251274721 is about 65201.7999828226. The cubic root of 4251274721 is about 1619.9678295954.

The spelling of 4251274721 in words is "four billion, two hundred fifty-one million, two hundred seventy-four thousand, seven hundred twenty-one".