1340039 has 2 divisors, whose sum is σ = 1340040. Its totient is φ = 1340038.

The previous prime is 1340033. The next prime is 1340041. The reversal of 1340039 is 9300431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340039 is a prime.

It is a Sophie Germain prime.

Together with 1340041, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1340039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670019 + 670020.

It is an arithmetic number, because the mean of its divisors is an integer number (670020).

2^1340039 is an apocalyptic number.

1340039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340039 is an equidigital number, since it uses as much as digits as its factorization.

1340039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1340039 is about 1157.6005355908. The cubic root of 1340039 is about 110.2484466987.

The spelling of 1340039 in words is "one million, three hundred forty thousand, thirty-nine".