1265343996 has 48 divisors (see below), whose sum is σ = 3376961280. Its totient is φ = 361236480.

The previous prime is 1265343973. The next prime is 1265343997. The reversal of 1265343996 is 6993435621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265343997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113011 + ... + 123701.

It is an arithmetic number, because the mean of its divisors is an integer number (70353360).

Almost surely, 2^1265343996 is an apocalyptic number.

It is an amenable number.

1265343996 is an abundant number, since it is smaller than the sum of its proper divisors (2111617284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265343996 is a wasteful number, since it uses less digits than its factorization.

1265343996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12114 (or 12112 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 48.

The square root of 1265343996 is about 35571.6740679997. The cubic root of 1265343996 is about 1081.6071169115.

The spelling of 1265343996 in words is "one billion, two hundred sixty-five million, three hundred forty-three thousand, nine hundred ninety-six".