1312165201 has 4 divisors (see below), whose sum is σ = 1313234100. Its totient is φ = 1311096304.

The previous prime is 1312165193. The next prime is 1312165219. The reversal of 1312165201 is 1025612131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1025612131 = 211 ⋅4860721.

It can be written as a sum of positive squares in 2 ways, for example, as 899100225 + 413064976 = 29985^2 + 20324^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312165201 - 2³ = 1312165193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312165301) 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, 532606 + ... + 535063.

It is an arithmetic number, because the mean of its divisors is an integer number (328308525).

Almost surely, 2^1312165201 is an apocalyptic number.

It is an amenable number.

1312165201 is a deficient number, since it is larger than the sum of its proper divisors (1068899).

1312165201 is a wasteful number, since it uses less digits than its factorization.

1312165201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068898.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1312165201 is about 36223.8209055864. The cubic root of 1312165201 is about 1094.7866812691.

Adding to 1312165201 its reverse (1025612131), we get a palindrome (2337777332).

The spelling of 1312165201 in words is "one billion, three hundred twelve million, one hundred sixty-five thousand, two hundred one".