1248147313 has 4 divisors (see below), whose sum is σ = 1426454080. Its totient is φ = 1069840548.

The previous prime is 1248147289. The next prime is 1248147353. The reversal of 1248147313 is 3137418421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3137418421 = 439 ⋅7146739.

It is not a de Polignac number, because 1248147313 - 2²⁵ = 1214592881 is a prime.

It is a super-3 number, since 3×1248147313³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248147353) 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, 89153373 + ... + 89153386.

It is an arithmetic number, because the mean of its divisors is an integer number (356613520).

Almost surely, 2^1248147313 is an apocalyptic number.

It is an amenable number.

1248147313 is a deficient number, since it is larger than the sum of its proper divisors (178306767).

1248147313 is an equidigital number, since it uses as much as digits as its factorization.

1248147313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178306766.

The product of its digits is 16128, while the sum is 34.

The square root of 1248147313 is about 35329.1283928715. The cubic root of 1248147313 is about 1076.6848827807.

The spelling of 1248147313 in words is "one billion, two hundred forty-eight million, one hundred forty-seven thousand, three hundred thirteen".