1315866047 has 4 divisors (see below), whose sum is σ = 1315947600. Its totient is φ = 1315784496.

The previous prime is 1315866023. The next prime is 1315866067. The reversal of 1315866047 is 7406685131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7406685131 = 641 ⋅11554891.

It is a cyclic number.

It is not a de Polignac number, because 1315866047 - 2¹⁴ = 1315849663 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1315865995 and 1315866013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315866007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7547 + ... + 51852.

It is an arithmetic number, because the mean of its divisors is an integer number (328986900).

Almost surely, 2^1315866047 is an apocalyptic number.

1315866047 is a deficient number, since it is larger than the sum of its proper divisors (81553).

1315866047 is an equidigital number, since it uses as much as digits as its factorization.

1315866047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81552.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 1315866047 is about 36274.8679804627. The cubic root of 1315866047 is about 1095.8149648444.

The spelling of 1315866047 in words is "one billion, three hundred fifteen million, eight hundred sixty-six thousand, forty-seven".