1326131047 has 4 divisors (see below), whose sum is σ = 1326632440. Its totient is φ = 1325629656.

The previous prime is 1326131041. The next prime is 1326131063. The reversal of 1326131047 is 7401316231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7401316231 = 17 ⋅435371543.

It is a cyclic number.

It is not a de Polignac number, because 1326131047 - 2³ = 1326131039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326131041) 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 3 ways as a sum of consecutive naturals, for example, 246708 + ... + 252025.

It is an arithmetic number, because the mean of its divisors is an integer number (331658110).

Almost surely, 2^1326131047 is an apocalyptic number.

1326131047 is a deficient number, since it is larger than the sum of its proper divisors (501393).

1326131047 is an equidigital number, since it uses as much as digits as its factorization.

1326131047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501392.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1326131047 is about 36416.0822577059. The cubic root of 1326131047 is about 1098.6570517463.

Adding to 1326131047 its reverse (7401316231), we get a palindrome (8727447278).

The spelling of 1326131047 in words is "one billion, three hundred twenty-six million, one hundred thirty-one thousand, forty-seven".