1340605465 has 8 divisors (see below), whose sum is σ = 1703357640. Its totient is φ = 1009396992.

The previous prime is 1340605463. The next prime is 1340605471. The reversal of 1340605465 is 5645060431.

It can be written as a sum of positive squares in 4 ways, for example, as 98465929 + 1242139536 = 9923^2 + 35244^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340605465 - 2¹ = 1340605463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1340605465.

It is not an unprimeable number, because it can be changed into a prime (1340605463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7885830 + ... + 7885999.

It is an arithmetic number, because the mean of its divisors is an integer number (212919705).

Almost surely, 2^1340605465 is an apocalyptic number.

It is an amenable number.

1340605465 is a deficient number, since it is larger than the sum of its proper divisors (362752175).

1340605465 is a wasteful number, since it uses less digits than its factorization.

1340605465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15771851.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 1340605465 is about 36614.2795231587. The cubic root of 1340605465 is about 1102.6397935322.

Adding to 1340605465 its reverse (5645060431), we get a palindrome (6985665896).

The spelling of 1340605465 in words is "one billion, three hundred forty million, six hundred five thousand, four hundred sixty-five".