1265113516 has 24 divisors (see below), whose sum is σ = 2295846000. Its totient is φ = 609263424.

The previous prime is 1265113513. The next prime is 1265113517. The reversal of 1265113516 is 6153115621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1265113511) 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, 35590 + ... + 61618.

It is an arithmetic number, because the mean of its divisors is an integer number (95660250).

Almost surely, 2^1265113516 is an apocalyptic number.

It is an amenable number.

1265113516 is a deficient number, since it is larger than the sum of its proper divisors (1030732484).

1265113516 is a wasteful number, since it uses less digits than its factorization.

1265113516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26481 (or 26479 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 1265113516 is about 35568.4342641056. The cubic root of 1265113516 is about 1081.5414420314.

The spelling of 1265113516 in words is "one billion, two hundred sixty-five million, one hundred thirteen thousand, five hundred sixteen".