1265125113 has 24 divisors (see below), whose sum is σ = 2117077248. Its totient is φ = 713022912.

The previous prime is 1265125109. The next prime is 1265125139. The reversal of 1265125113 is 3115215621.

1265125113 is a `hidden beast` number, since 1 + 2 + 651 + 2 + 5 + 1 + 1 + 3 = 666.

It is not a de Polignac number, because 1265125113 - 2² = 1265125109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1265125153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132945 + ... + 142142.

It is an arithmetic number, because the mean of its divisors is an integer number (88211552).

Almost surely, 2^1265125113 is an apocalyptic number.

It is an amenable number.

1265125113 is a deficient number, since it is larger than the sum of its proper divisors (851952135).

1265125113 is a wasteful number, since it uses less digits than its factorization.

1265125113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275173 (or 275170 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1265125113 is about 35568.5972874950. The cubic root of 1265125113 is about 1081.5447467672.

The spelling of 1265125113 in words is "one billion, two hundred sixty-five million, one hundred twenty-five thousand, one hundred thirteen".