1245304689973 has 2 divisors, whose sum is σ = 1245304689974. Its totient is φ = 1245304689972.

The previous prime is 1245304689971. The next prime is 1245304689983. The reversal of 1245304689973 is 3799864035421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1211368786884 + 33935903089 = 1100622^2 + 184217^2 .

It is an emirp because it is prime and its reverse (3799864035421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1245304689973 - 2¹ = 1245304689971 is a prime.

Together with 1245304689971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245304689971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622652344986 + 622652344987.

It is an arithmetic number, because the mean of its divisors is an integer number (622652344987).

It is a 1-persistent number, because it is pandigital, but 2⋅1245304689973 = 2490609379946 is not.

Almost surely, 2^{1245304689973} is an apocalyptic number.

It is an amenable number.

1245304689973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245304689973 is an equidigital number, since it uses as much as digits as its factorization.

1245304689973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 61.

The spelling of 1245304689973 in words is "one trillion, two hundred forty-five billion, three hundred four million, six hundred eighty-nine thousand, nine hundred seventy-three".