1265126395 has 24 divisors (see below), whose sum is σ = 1649450736. Its totient is φ = 931102848.

The previous prime is 1265126389. The next prime is 1265126413. The reversal of 1265126395 is 5936215621.

It is a de Polignac number, because none of the positive numbers 2^k-1265126395 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265504 + ... + 270226.

It is an arithmetic number, because the mean of its divisors is an integer number (68727114).

Almost surely, 2^1265126395 is an apocalyptic number.

1265126395 is a deficient number, since it is larger than the sum of its proper divisors (384324341).

1265126395 is a wasteful number, since it uses less digits than its factorization.

1265126395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071 (or 5058 counting only the distinct ones).

The product of its digits is 97200, while the sum is 40.

The square root of 1265126395 is about 35568.6153090052. The cubic root of 1265126395 is about 1081.5451120908.

The spelling of 1265126395 in words is "one billion, two hundred sixty-five million, one hundred twenty-six thousand, three hundred ninety-five".