1245311545253 has 8 divisors (see below), whose sum is σ = 1319914789272. Its totient is φ = 1170858259456.

The previous prime is 1245311545249. The next prime is 1245311545297. The reversal of 1245311545253 is 3525451135421.

It can be written as a sum of positive squares in 4 ways, for example, as 530241743329 + 715069801924 = 728177^2 + 845618^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1245311545253 - 2² = 1245311545249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1245311545253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245311545213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37472450 + ... + 37505667.

It is an arithmetic number, because the mean of its divisors is an integer number (164989348659).

Almost surely, 2^{1245311545253} is an apocalyptic number.

It is an amenable number.

1245311545253 is a deficient number, since it is larger than the sum of its proper divisors (74603244019).

1245311545253 is an equidigital number, since it uses as much as digits as its factorization.

1245311545253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74979111.

The product of its digits is 360000, while the sum is 41.

The spelling of 1245311545253 in words is "one trillion, two hundred forty-five billion, three hundred eleven million, five hundred forty-five thousand, two hundred fifty-three".