1340040503 has 6 divisors (see below), whose sum is σ = 1384663032. Its totient is φ = 1296812460.

The previous prime is 1340040491. The next prime is 1340040553. The reversal of 1340040503 is 3050400431.

It is not a de Polignac number, because 1340040503 - 2²⁴ = 1323263287 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 (1340040553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 696251 + ... + 698172.

It is an arithmetic number, because the mean of its divisors is an integer number (230777172).

Almost surely, 2^1340040503 is an apocalyptic number.

1340040503 is a deficient number, since it is larger than the sum of its proper divisors (44622529).

1340040503 is an equidigital number, since it uses as much as digits as its factorization.

1340040503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394485 (or 1394454 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1340040503 is about 36606.5636600870. The cubic root of 1340040503 is about 1102.4848791724.

Adding to 1340040503 its reverse (3050400431), we get a palindrome (4390440934).

The spelling of 1340040503 in words is "one billion, three hundred forty million, forty thousand, five hundred three".