1340134205 has 4 divisors (see below), whose sum is σ = 1608161052. Its totient is φ = 1072107360.

The previous prime is 1340134199. The next prime is 1340134207. The reversal of 1340134205 is 5024310431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 425555641 + 914578564 = 20629^2 + 30242^2 .

It is not a de Polignac number, because 1340134205 - 2⁶ = 1340134141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340134207) 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, 134013416 + ... + 134013425.

It is an arithmetic number, because the mean of its divisors is an integer number (402040263).

Almost surely, 2^1340134205 is an apocalyptic number.

It is an amenable number.

1340134205 is a deficient number, since it is larger than the sum of its proper divisors (268026847).

1340134205 is an equidigital number, since it uses as much as digits as its factorization.

1340134205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268026846.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1340134205 is about 36607.8434901593. The cubic root of 1340134205 is about 1102.5105755675.

Adding to 1340134205 its reverse (5024310431), we get a palindrome (6364444636).

The spelling of 1340134205 in words is "one billion, three hundred forty million, one hundred thirty-four thousand, two hundred five".