1265642296 has 8 divisors (see below), whose sum is σ = 2373079320. Its totient is φ = 632821144.

The previous prime is 1265642291. The next prime is 1265642303. The reversal of 1265642296 is 6922465621.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265642291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79102636 + ... + 79102651.

It is an arithmetic number, because the mean of its divisors is an integer number (296634915).

Almost surely, 2^1265642296 is an apocalyptic number.

It is an amenable number.

1265642296 is a deficient number, since it is larger than the sum of its proper divisors (1107437024).

1265642296 is a wasteful number, since it uses less digits than its factorization.

1265642296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158205293 (or 158205289 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 1265642296 is about 35575.8667638611. The cubic root of 1265642296 is about 1081.6921051449.

The spelling of 1265642296 in words is "one billion, two hundred sixty-five million, six hundred forty-two thousand, two hundred ninety-six".