1265313247 has 16 divisors (see below), whose sum is σ = 1472083200. Its totient is φ = 1074810240.

The previous prime is 1265313229. The next prime is 1265313253. The reversal of 1265313247 is 7423135621.

It is a cyclic number.

It is not a de Polignac number, because 1265313247 - 2²³ = 1256924639 is a prime.

It is a super-2 number, since 2×1265313247² = 3202035226067366018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265313277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1654 + ... + 50332.

It is an arithmetic number, because the mean of its divisors is an integer number (92005200).

Almost surely, 2^1265313247 is an apocalyptic number.

1265313247 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1265313247 is a deficient number, since it is larger than the sum of its proper divisors (206769953).

1265313247 is a wasteful number, since it uses less digits than its factorization.

1265313247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48846.

The product of its digits is 30240, while the sum is 34.

The square root of 1265313247 is about 35571.2418534973. The cubic root of 1265313247 is about 1081.5983554978.

Adding to 1265313247 its reverse (7423135621), we get a palindrome (8688448868).

The spelling of 1265313247 in words is "one billion, two hundred sixty-five million, three hundred thirteen thousand, two hundred forty-seven".