1205243410523 has 2 divisors, whose sum is σ = 1205243410524. Its totient is φ = 1205243410522.

The previous prime is 1205243410507. The next prime is 1205243410529. The reversal of 1205243410523 is 3250143425021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1205243410523 - 2⁴ = 1205243410507 is a prime.

It is a super-2 number, since 2×1205243410523² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1205243410523.

It is not a weakly prime, because it can be changed into another prime (1205243410529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602621705261 + 602621705262.

It is an arithmetic number, because the mean of its divisors is an integer number (602621705262).

Almost surely, 2^{1205243410523} is an apocalyptic number.

1205243410523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205243410523 is an equidigital number, since it uses as much as digits as its factorization.

1205243410523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 1205243410523 its reverse (3250143425021), we get a palindrome (4455386835544).

The spelling of 1205243410523 in words is "one trillion, two hundred five billion, two hundred forty-three million, four hundred ten thousand, five hundred twenty-three".