1265011383 has 16 divisors (see below), whose sum is σ = 1722147840. Its totient is φ = 825788544.

The previous prime is 1265011373. The next prime is 1265011387. The reversal of 1265011383 is 3831105621.

It is not a de Polignac number, because 1265011383 - 2¹⁰ = 1265010359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1265011383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265011387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5658 + ... + 50616.

It is an arithmetic number, because the mean of its divisors is an integer number (107634240).

Almost surely, 2^1265011383 is an apocalyptic number.

1265011383 is a deficient number, since it is larger than the sum of its proper divisors (457136457).

1265011383 is a wasteful number, since it uses less digits than its factorization.

1265011383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45158.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1265011383 is about 35566.9985098546. The cubic root of 1265011383 is about 1081.5123368580.

The spelling of 1265011383 in words is "one billion, two hundred sixty-five million, eleven thousand, three hundred eighty-three".