1311642426 has 16 divisors (see below), whose sum is σ = 2707907328. Its totient is φ = 423110400.

The previous prime is 1311642391. The next prime is 1311642433. The reversal of 1311642426 is 6242461131.

It is a junction number, because it is equal to n+sod(n) for n = 1311642393 and 1311642402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3525735 + ... + 3526106.

It is an arithmetic number, because the mean of its divisors is an integer number (169244208).

Almost surely, 2^1311642426 is an apocalyptic number.

1311642426 is an abundant number, since it is smaller than the sum of its proper divisors (1396264902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311642426 is a wasteful number, since it uses less digits than its factorization.

1311642426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7051877.

The product of its digits is 6912, while the sum is 30.

The square root of 1311642426 is about 36216.6042858797. The cubic root of 1311642426 is about 1094.6412719538.

The spelling of 1311642426 in words is "one billion, three hundred eleven million, six hundred forty-two thousand, four hundred twenty-six".