1247131003813 has 8 divisors (see below), whose sum is σ = 1256281551000. Its totient is φ = 1237990864128.

The previous prime is 1247131003799. The next prime is 1247131003819. The reversal of 1247131003813 is 3183001317421.

It can be written as a sum of positive squares in 4 ways, for example, as 33006895684 + 1214124108129 = 181678^2 + 1101873^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1247131003813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247131003819) 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, 2361256 + ... + 2840737.

It is an arithmetic number, because the mean of its divisors is an integer number (157035193875).

Almost surely, 2^{1247131003813} is an apocalyptic number.

It is an amenable number.

1247131003813 is a deficient number, since it is larger than the sum of its proper divisors (9150547187).

1247131003813 is a wasteful number, since it uses less digits than its factorization.

1247131003813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5203751.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 1247131003813 in words is "one trillion, two hundred forty-seven billion, one hundred thirty-one million, three thousand, eight hundred thirteen".