1265524313 has 4 divisors (see below), whose sum is σ = 1266238260. Its totient is φ = 1264810368.

The previous prime is 1265524297. The next prime is 1265524367. The reversal of 1265524313 is 3134255621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 213949129 + 1051575184 = 14627^2 + 32428^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265524313 - 2⁴ = 1265524297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265524313.

It is not an unprimeable number, because it can be changed into a prime (1265524373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354308 + ... + 357861.

It is an arithmetic number, because the mean of its divisors is an integer number (316559565).

Almost surely, 2^1265524313 is an apocalyptic number.

It is an amenable number.

1265524313 is a deficient number, since it is larger than the sum of its proper divisors (713947).

1265524313 is an equidigital number, since it uses as much as digits as its factorization.

1265524313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713946.

The product of its digits is 21600, while the sum is 32.

The square root of 1265524313 is about 35574.2085365226. The cubic root of 1265524313 is about 1081.6584923708.

Adding to 1265524313 its reverse (3134255621), we get a palindrome (4399779934).

The spelling of 1265524313 in words is "one billion, two hundred sixty-five million, five hundred twenty-four thousand, three hundred thirteen".