1312744129 has 4 divisors (see below), whose sum is σ = 1312858800. Its totient is φ = 1312629460.

The previous prime is 1312744031. The next prime is 1312744151. The reversal of 1312744129 is 9214472131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1312744129 - 2¹⁹ = 1312219841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312744094 and 1312744103.

It is not an unprimeable number, because it can be changed into a prime (1312744229) 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, 37987 + ... + 63784.

It is an arithmetic number, because the mean of its divisors is an integer number (328214700).

Almost surely, 2^1312744129 is an apocalyptic number.

It is an amenable number.

1312744129 is a deficient number, since it is larger than the sum of its proper divisors (114671).

1312744129 is a wasteful number, since it uses less digits than its factorization.

1312744129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114670.

The product of its digits is 12096, while the sum is 34.

The square root of 1312744129 is about 36231.8110091119. The cubic root of 1312744129 is about 1094.9476644225.

The spelling of 1312744129 in words is "one billion, three hundred twelve million, seven hundred forty-four thousand, one hundred twenty-nine".