1313244261 has 24 divisors (see below), whose sum is σ = 2281997120. Its totient is φ = 710928576.

The previous prime is 1313244221. The next prime is 1313244301. The reversal of 1313244261 is 1624423131.

It is a happy number.

1313244261 is a `hidden beast` number, since 131 + 32 + 442 + 61 = 666.

It is an interprime number because it is at equal distance from previous prime (1313244221) and next prime (1313244301).

It is not a de Polignac number, because 1313244261 - 2⁶ = 1313244197 is a prime.

It is a super-2 number, since 2×1313244261² = 3449220978098872242, 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 (1313244221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 547360 + ... + 549753.

Almost surely, 2^1313244261 is an apocalyptic number.

It is an amenable number.

1313244261 is a deficient number, since it is larger than the sum of its proper divisors (968752859).

1313244261 is a wasteful number, since it uses less digits than its factorization.

1313244261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097145 (or 1097142 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1313244261 is about 36238.7121873833. The cubic root of 1313244261 is about 1095.0866985835.

Adding to 1313244261 its reverse (1624423131), we get a palindrome (2937667392).

The spelling of 1313244261 in words is "one billion, three hundred thirteen million, two hundred forty-four thousand, two hundred sixty-one".