1340503287 has 4 divisors (see below), whose sum is σ = 1787337720. Its totient is φ = 893668856.

The previous prime is 1340503259. The next prime is 1340503331. The reversal of 1340503287 is 7823050431.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340503287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340503207) 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, 223417212 + ... + 223417217.

It is an arithmetic number, because the mean of its divisors is an integer number (446834430).

Almost surely, 2^1340503287 is an apocalyptic number.

1340503287 is a deficient number, since it is larger than the sum of its proper divisors (446834433).

1340503287 is an equidigital number, since it uses as much as digits as its factorization.

1340503287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446834432.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1340503287 is about 36612.8841666428. The cubic root of 1340503287 is about 1102.6117792272.

The spelling of 1340503287 in words is "one billion, three hundred forty million, five hundred three thousand, two hundred eighty-seven".