1265167915 has 32 divisors (see below), whose sum is σ = 1760797440. Its totient is φ = 862992000.

The previous prime is 1265167909. The next prime is 1265167933. The reversal of 1265167915 is 5197615621.

It is not a de Polignac number, because 1265167915 - 2¹³ = 1265159723 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 99552 + ... + 111538.

It is an arithmetic number, because the mean of its divisors is an integer number (55024920).

Almost surely, 2^1265167915 is an apocalyptic number.

1265167915 is a deficient number, since it is larger than the sum of its proper divisors (495629525).

1265167915 is a wasteful number, since it uses less digits than its factorization.

1265167915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12123.

The product of its digits is 113400, while the sum is 43.

The square root of 1265167915 is about 35569.1989648347. The cubic root of 1265167915 is about 1081.5569436521.

It can be divided in two parts, 126516 and 7915, that added together give a palindrome (134431).

The spelling of 1265167915 in words is "one billion, two hundred sixty-five million, one hundred sixty-seven thousand, nine hundred fifteen".