1246717399225 has 9 divisors (see below), whose sum is σ = 1545936497773. Its totient is φ = 997369453120.

The previous prime is 1246717399223. The next prime is 1246717399261. The reversal of 1246717399225 is 5229937176421.

The square root of 1246717399225 is 1116565.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 336303726889 + 910413672336 = 579917^2 + 954156^2 .

It is not a de Polignac number, because 1246717399225 - 2¹ = 1246717399223 is a prime.

It is a super-3 number, since 3×1246717399225³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1246717399225.

It is not an unprimeable number, because it can be changed into a prime (1246717399223) 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 in 8 ways as a sum of consecutive naturals, for example, 5471169 + ... + 5694481.

Almost surely, 2^{1246717399225} is an apocalyptic number.

1246717399225 is the 1116565-th square number.

1246717399225 is the 558283-rd centered octagonal number.

It is an amenable number.

1246717399225 is a deficient number, since it is larger than the sum of its proper divisors (299219098548).

1246717399225 is an frugal number, since it uses more digits than its factorization.

1246717399225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446636 (or 223318 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 58.

The spelling of 1246717399225 in words is "one trillion, two hundred forty-six billion, seven hundred seventeen million, three hundred ninety-nine thousand, two hundred twenty-five".