1311286471 has 4 divisors (see below), whose sum is σ = 1430494344. Its totient is φ = 1192078600.

The previous prime is 1311286469. The next prime is 1311286481. The reversal of 1311286471 is 1746821131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1746821131 = 11 ⋅158801921.

It is a cyclic number.

It is not a de Polignac number, because 1311286471 - 2¹ = 1311286469 is a prime.

It is a super-3 number, since 3×1311286471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311286481) 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, 59603920 + ... + 59603941.

It is an arithmetic number, because the mean of its divisors is an integer number (357623586).

Almost surely, 2^1311286471 is an apocalyptic number.

1311286471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1311286471 is a deficient number, since it is larger than the sum of its proper divisors (119207873).

1311286471 is a wasteful number, since it uses less digits than its factorization.

1311286471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119207872.

The product of its digits is 8064, while the sum is 34.

The square root of 1311286471 is about 36211.6897009792. The cubic root of 1311286471 is about 1094.5422413342.

It can be divided in two parts, 1311 and 286471, that added together give a palindrome (287782).

The spelling of 1311286471 in words is "one billion, three hundred eleven million, two hundred eighty-six thousand, four hundred seventy-one".