1340543506 has 8 divisors (see below), whose sum is σ = 2019674160. Its totient is φ = 667318788.

The previous prime is 1340543497. The next prime is 1340543507. The reversal of 1340543506 is 6053450431.

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

It is not an unprimeable number, because it can be changed into a prime (1340543507) 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, 1475916 + ... + 1476823.

It is an arithmetic number, because the mean of its divisors is an integer number (252459270).

Almost surely, 2^1340543506 is an apocalyptic number.

1340543506 is a deficient number, since it is larger than the sum of its proper divisors (679130654).

1340543506 is a wasteful number, since it uses less digits than its factorization.

1340543506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952968.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 1340543506 is about 36613.4334090645. The cubic root of 1340543506 is about 1102.6228063044.

Adding to 1340543506 its reverse (6053450431), we get a palindrome (7393993937).

The spelling of 1340543506 in words is "one billion, three hundred forty million, five hundred forty-three thousand, five hundred six".