1245531017 has 2 divisors, whose sum is σ = 1245531018. Its totient is φ = 1245531016.

The previous prime is 1245530977. The next prime is 1245531041. The reversal of 1245531017 is 7101355421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1193633401 + 51897616 = 34549^2 + 7204^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245531017 - 2¹² = 1245526921 is a prime.

It is a super-3 number, since 3×1245531017³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1245531317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622765508 + 622765509.

It is an arithmetic number, because the mean of its divisors is an integer number (622765509).

Almost surely, 2^1245531017 is an apocalyptic number.

It is an amenable number.

1245531017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245531017 is an equidigital number, since it uses as much as digits as its factorization.

1245531017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 1245531017 is about 35292.0815056296. The cubic root of 1245531017 is about 1075.9320611531.

Adding to 1245531017 its reverse (7101355421), we get a palindrome (8346886438).

The spelling of 1245531017 in words is "one billion, two hundred forty-five million, five hundred thirty-one thousand, seventeen".