1311254745 has 8 divisors (see below), whose sum is σ = 2098007616. Its totient is φ = 699335856.

The previous prime is 1311254723. The next prime is 1311254759. The reversal of 1311254745 is 5474521131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311254745 - 2⁹ = 1311254233 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43708477 + ... + 43708506.

It is an arithmetic number, because the mean of its divisors is an integer number (262250952).

Almost surely, 2^1311254745 is an apocalyptic number.

1311254745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311254745 is a deficient number, since it is larger than the sum of its proper divisors (786752871).

1311254745 is an equidigital number, since it uses as much as digits as its factorization.

1311254745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87416991.

The product of its digits is 16800, while the sum is 33.

The square root of 1311254745 is about 36211.2516353688. The cubic root of 1311254745 is about 1094.5334139401.

Adding to 1311254745 its reverse (5474521131), we get a palindrome (6785775876).

The spelling of 1311254745 in words is "one billion, three hundred eleven million, two hundred fifty-four thousand, seven hundred forty-five".