1247275241 has 2 divisors, whose sum is σ = 1247275242. Its totient is φ = 1247275240.

The previous prime is 1247275231. The next prime is 1247275319. The reversal of 1247275241 is 1425727421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1147854400 + 99420841 = 33880^2 + 9971^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1247275241 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1247275231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623637620 + 623637621.

It is an arithmetic number, because the mean of its divisors is an integer number (623637621).

Almost surely, 2^1247275241 is an apocalyptic number.

It is an amenable number.

1247275241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247275241 is an equidigital number, since it uses as much as digits as its factorization.

1247275241 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 1247275241 is about 35316.7841259648. The cubic root of 1247275241 is about 1076.4340669000.

The spelling of 1247275241 in words is "one billion, two hundred forty-seven million, two hundred seventy-five thousand, two hundred forty-one".