1312325261 has 8 divisors (see below), whose sum is σ = 1419974304. Its totient is φ = 1205633520.

The previous prime is 1312325257. The next prime is 1312325281. The reversal of 1312325261 is 1625232131.

It is a happy number.

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

It is not a de Polignac number, because 1312325261 - 2² = 1312325257 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 1312325261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312325281) 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, 236471 + ... + 241956.

It is an arithmetic number, because the mean of its divisors is an integer number (177496788).

Almost surely, 2^1312325261 is an apocalyptic number.

It is an amenable number.

1312325261 is a deficient number, since it is larger than the sum of its proper divisors (107649043).

1312325261 is a wasteful number, since it uses less digits than its factorization.

1312325261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478651.

The product of its digits is 2160, while the sum is 26.

The square root of 1312325261 is about 36226.0301578851. The cubic root of 1312325261 is about 1094.8311940666.

Adding to 1312325261 its reverse (1625232131), we get a palindrome (2937557392).

The spelling of 1312325261 in words is "one billion, three hundred twelve million, three hundred twenty-five thousand, two hundred sixty-one".