1245331313 has 8 divisors (see below), whose sum is σ = 1258522920. Its totient is φ = 1232156800.

The previous prime is 1245331201. The next prime is 1245331319. The reversal of 1245331313 is 3131335421.

It can be written as a sum of positive squares in 4 ways, for example, as 860072929 + 385258384 = 29327^2 + 19628^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1245331313 - 2¹⁸ = 1245069169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245331319) 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 7 ways as a sum of consecutive naturals, for example, 186293 + ... + 192861.

It is an arithmetic number, because the mean of its divisors is an integer number (157315365).

Almost surely, 2^1245331313 is an apocalyptic number.

It is an amenable number.

1245331313 is a deficient number, since it is larger than the sum of its proper divisors (13191607).

1245331313 is a wasteful number, since it uses less digits than its factorization.

1245331313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8547.

The product of its digits is 3240, while the sum is 26.

The square root of 1245331313 is about 35289.2520889860. The cubic root of 1245331313 is about 1075.8745543767.

Adding to 1245331313 its reverse (3131335421), we get a palindrome (4376666734).

The spelling of 1245331313 in words is "one billion, two hundred forty-five million, three hundred thirty-one thousand, three hundred thirteen".