1245542243249 has 2 divisors, whose sum is σ = 1245542243250. Its totient is φ = 1245542243248.

The previous prime is 1245542243237. The next prime is 1245542243263. The reversal of 1245542243249 is 9423422455421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1023196987024 + 222345256225 = 1011532^2 + 471535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245542243249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245542243269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622771121624 + 622771121625.

It is an arithmetic number, because the mean of its divisors is an integer number (622771121625).

Almost surely, 2^{1245542243249} is an apocalyptic number.

It is an amenable number.

1245542243249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245542243249 is an equidigital number, since it uses as much as digits as its factorization.

1245542243249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2764800, while the sum is 47.

The spelling of 1245542243249 in words is "one trillion, two hundred forty-five billion, five hundred forty-two million, two hundred forty-three thousand, two hundred forty-nine".