1312513127 has 4 divisors (see below), whose sum is σ = 1313580576. Its totient is φ = 1311445680.

The previous prime is 1312513087. The next prime is 1312513151. The reversal of 1312513127 is 7213152131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312513127 - 2¹⁸ = 1312250983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312513096 and 1312513105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312513157) 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, 531878 + ... + 534339.

It is an arithmetic number, because the mean of its divisors is an integer number (328395144).

Almost surely, 2^1312513127 is an apocalyptic number.

1312513127 is a deficient number, since it is larger than the sum of its proper divisors (1067449).

1312513127 is a wasteful number, since it uses less digits than its factorization.

1312513127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067448.

The product of its digits is 1260, while the sum is 26.

The square root of 1312513127 is about 36228.6230348326. The cubic root of 1312513127 is about 1094.8834351152.

Adding to 1312513127 its reverse (7213152131), we get a palindrome (8525665258).

The spelling of 1312513127 in words is "one billion, three hundred twelve million, five hundred thirteen thousand, one hundred twenty-seven".