1245290662817 has 4 divisors (see below), whose sum is σ = 1245318180420. Its totient is φ = 1245263145216.

The previous prime is 1245290662807. The next prime is 1245290662841. The reversal of 1245290662817 is 7182660925421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 730812975376 + 514477687441 = 854876^2 + 717271^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245290662817 - 2¹⁴ = 1245290646433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245290662807) 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 in 3 ways as a sum of consecutive naturals, for example, 13690808 + ... + 13781465.

It is an arithmetic number, because the mean of its divisors is an integer number (311329545105).

Almost surely, 2^{1245290662817} is an apocalyptic number.

It is an amenable number.

1245290662817 is a deficient number, since it is larger than the sum of its proper divisors (27517603).

1245290662817 is an equidigital number, since it uses as much as digits as its factorization.

1245290662817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27517602.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 1245290662817 in words is "one trillion, two hundred forty-five billion, two hundred ninety million, six hundred sixty-two thousand, eight hundred seventeen".