1245504105321 has 12 divisors (see below), whose sum is σ = 1931802286032. Its totient is φ = 711716631528.

The previous prime is 1245504105311. The next prime is 1245504105401. The reversal of 1245504105321 is 1235014055421.

It is not a de Polignac number, because 1245504105321 - 2⁷ = 1245504105193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245504105311) 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 in 11 ways as a sum of consecutive naturals, for example, 4236408375 + ... + 4236408668.

It is an arithmetic number, because the mean of its divisors is an integer number (160983523836).

Almost surely, 2^{1245504105321} is an apocalyptic number.

It is an amenable number.

1245504105321 is a deficient number, since it is larger than the sum of its proper divisors (686298180711).

1245504105321 is an equidigital number, since it uses as much as digits as its factorization.

1245504105321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8472817060 (or 8472817053 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 1245504105321 in words is "one trillion, two hundred forty-five billion, five hundred four million, one hundred five thousand, three hundred twenty-one".