1265113515 has 8 divisors (see below), whose sum is σ = 2024181648. Its totient is φ = 674727200.

The previous prime is 1265113513. The next prime is 1265113517. The reversal of 1265113515 is 5153115621.

It is an interprime number because it is at equal distance from previous prime (1265113513) and next prime (1265113517).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1265113515 - 2¹ = 1265113513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1265113511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42170436 + ... + 42170465.

It is an arithmetic number, because the mean of its divisors is an integer number (253022706).

Almost surely, 2^1265113515 is an apocalyptic number.

1265113515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1265113515 is a deficient number, since it is larger than the sum of its proper divisors (759068133).

1265113515 is an equidigital number, since it uses as much as digits as its factorization.

1265113515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84340909.

The product of its digits is 4500, while the sum is 30.

The square root of 1265113515 is about 35568.4342500482. The cubic root of 1265113515 is about 1081.5414417465.

The spelling of 1265113515 in words is "one billion, two hundred sixty-five million, one hundred thirteen thousand, five hundred fifteen".