1311975445 has 8 divisors (see below), whose sum is σ = 1717495200. Its totient is φ = 954163920.

The previous prime is 1311975421. The next prime is 1311975463. The reversal of 1311975445 is 5445791131.

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

It is not a de Polignac number, because 1311975445 - 2⁹ = 1311974933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311975398 and 1311975407.

It is a congruent number.

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, 11926995 + ... + 11927104.

It is an arithmetic number, because the mean of its divisors is an integer number (214686900).

Almost surely, 2^1311975445 is an apocalyptic number.

It is an amenable number.

1311975445 is a deficient number, since it is larger than the sum of its proper divisors (405519755).

1311975445 is a wasteful number, since it uses less digits than its factorization.

1311975445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23854115.

The product of its digits is 75600, while the sum is 40.

The square root of 1311975445 is about 36221.2015951984. The cubic root of 1311975445 is about 1094.7339053036.

The spelling of 1311975445 in words is "one billion, three hundred eleven million, nine hundred seventy-five thousand, four hundred forty-five".