1245523004521 has 2 divisors, whose sum is σ = 1245523004522. Its totient is φ = 1245523004520.

The previous prime is 1245523004489. The next prime is 1245523004533. The reversal of 1245523004521 is 1254003255421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670752810025 + 574770194496 = 818995^2 + 758136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245523004521 - 2⁵ = 1245523004489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245523004221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622761502260 + 622761502261.

It is an arithmetic number, because the mean of its divisors is an integer number (622761502261).

Almost surely, 2^{1245523004521} is an apocalyptic number.

It is an amenable number.

1245523004521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245523004521 is an equidigital number, since it uses as much as digits as its factorization.

1245523004521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 1245523004521 its reverse (1254003255421), we get a palindrome (2499526259942).

The spelling of 1245523004521 in words is "one trillion, two hundred forty-five billion, five hundred twenty-three million, four thousand, five hundred twenty-one".