1245087617 has 2 divisors, whose sum is σ = 1245087618. Its totient is φ = 1245087616.

The previous prime is 1245087593. The next prime is 1245087619. The reversal of 1245087617 is 7167805421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1069551616 + 175536001 = 32704^2 + 13249^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245087617 - 2¹⁸ = 1244825473 is a prime.

Together with 1245087619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1245087619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622543808 + 622543809.

It is an arithmetic number, because the mean of its divisors is an integer number (622543809).

Almost surely, 2^1245087617 is an apocalyptic number.

It is an amenable number.

1245087617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245087617 is an equidigital number, since it uses as much as digits as its factorization.

1245087617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 1245087617 is about 35285.7990840508. The cubic root of 1245087617 is about 1075.8043713321.

The spelling of 1245087617 in words is "one billion, two hundred forty-five million, eighty-seven thousand, six hundred seventeen".