1340312471 has 4 divisors (see below), whose sum is σ = 1340403600. Its totient is φ = 1340221344.

The previous prime is 1340312461. The next prime is 1340312473. The reversal of 1340312471 is 1742130431.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1340312471 - 2¹⁰ = 1340311447 is a prime.

It is a super-3 number, since 3×1340312471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340312471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340312473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17906 + ... + 54783.

It is an arithmetic number, because the mean of its divisors is an integer number (335100900).

Almost surely, 2^1340312471 is an apocalyptic number.

1340312471 is a deficient number, since it is larger than the sum of its proper divisors (91129).

1340312471 is an equidigital number, since it uses as much as digits as its factorization.

1340312471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91128.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1340312471 is about 36610.2782152772. The cubic root of 1340312471 is about 1102.5594590886.

The spelling of 1340312471 in words is "one billion, three hundred forty million, three hundred twelve thousand, four hundred seventy-one".