1248316291 has 4 divisors (see below), whose sum is σ = 1248508800. Its totient is φ = 1248123784.

The previous prime is 1248316271. The next prime is 1248316319. The reversal of 1248316291 is 1926138421.

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 1248316291 - 2⁷ = 1248316163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1248316291.

It is not an unprimeable number, because it can be changed into a prime (1248316241) 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, 86176 + ... + 99613.

It is an arithmetic number, because the mean of its divisors is an integer number (312127200).

Almost surely, 2^1248316291 is an apocalyptic number.

1248316291 is a deficient number, since it is larger than the sum of its proper divisors (192509).

1248316291 is an equidigital number, since it uses as much as digits as its factorization.

1248316291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192508.

The product of its digits is 20736, while the sum is 37.

The square root of 1248316291 is about 35331.5197946536. The cubic root of 1248316291 is about 1076.7334688854.

The spelling of 1248316291 in words is "one billion, two hundred forty-eight million, three hundred sixteen thousand, two hundred ninety-one".