1265383996 has 24 divisors (see below), whose sum is σ = 2237530064. Its totient is φ = 626123520.

The previous prime is 1265383981. The next prime is 1265383997. The reversal of 1265383996 is 6993835621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265383997) 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, 153106 + ... + 161158.

Almost surely, 2^1265383996 is an apocalyptic number.

It is an amenable number.

1265383996 is a deficient number, since it is larger than the sum of its proper divisors (972146068).

1265383996 is a wasteful number, since it uses less digits than its factorization.

1265383996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8461 (or 8459 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 52.

The square root of 1265383996 is about 35572.2363086720. The cubic root of 1265383996 is about 1081.6185140307.

The spelling of 1265383996 in words is "one billion, two hundred sixty-five million, three hundred eighty-three thousand, nine hundred ninety-six".