1265113242356 has 12 divisors (see below), whose sum is σ = 2290291214820. Its totient is φ = 610744323840.

The previous prime is 1265113242229. The next prime is 1265113242361. The reversal of 1265113242356 is 6532423115621.

It can be written as a sum of positive squares in 2 ways, for example, as 220445274256 + 1044667968100 = 469516^2 + 1022090^2 .

It is a super-2 number, since 2×1265113242356² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5453074205 + ... + 5453074436.

It is an arithmetic number, because the mean of its divisors is an integer number (190857601235).

Almost surely, 2^{1265113242356} is an apocalyptic number.

It is an amenable number.

1265113242356 is a deficient number, since it is larger than the sum of its proper divisors (1025177972464).

1265113242356 is a wasteful number, since it uses less digits than its factorization.

1265113242356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10906148674 (or 10906148672 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

Adding to 1265113242356 its reverse (6532423115621), we get a palindrome (7797536357977).

The spelling of 1265113242356 in words is "one trillion, two hundred sixty-five billion, one hundred thirteen million, two hundred forty-two thousand, three hundred fifty-six".