1311371285 has 16 divisors (see below), whose sum is σ = 1799280000. Its totient is φ = 898812096.

The previous prime is 1311371273. The next prime is 1311371291. The reversal of 1311371285 is 5821731131.

It is not a de Polignac number, because 1311371285 - 2⁶ = 1311371221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81866 + ... + 96564.

It is an arithmetic number, because the mean of its divisors is an integer number (112455000).

Almost surely, 2^1311371285 is an apocalyptic number.

It is an amenable number.

1311371285 is a deficient number, since it is larger than the sum of its proper divisors (487908715).

1311371285 is a wasteful number, since it uses less digits than its factorization.

1311371285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17260.

The product of its digits is 5040, while the sum is 32.

The square root of 1311371285 is about 36212.8607679647. The cubic root of 1311371285 is about 1094.5658391537.

The spelling of 1311371285 in words is "one billion, three hundred eleven million, three hundred seventy-one thousand, two hundred eighty-five".