1246253502721 has 2 divisors, whose sum is σ = 1246253502722. Its totient is φ = 1246253502720.

The previous prime is 1246253502617. The next prime is 1246253502763. The reversal of 1246253502721 is 1272053526421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 693074565121 + 553178937600 = 832511^2 + 743760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246253502721 - 2¹¹ = 1246253500673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1246253502821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623126751360 + 623126751361.

It is an arithmetic number, because the mean of its divisors is an integer number (623126751361).

Almost surely, 2^{1246253502721} is an apocalyptic number.

It is an amenable number.

1246253502721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246253502721 is an equidigital number, since it uses as much as digits as its factorization.

1246253502721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 1246253502721 in words is "one trillion, two hundred forty-six billion, two hundred fifty-three million, five hundred two thousand, seven hundred twenty-one".