1340837 has 2 divisors, whose sum is σ = 1340838. Its totient is φ = 1340836.

The previous prime is 1340827. The next prime is 1340861. The reversal of 1340837 is 7380431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 923521 + 417316 = 961^2 + 646^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340837 - 2¹⁰ = 1339813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670418 + 670419.

It is an arithmetic number, because the mean of its divisors is an integer number (670419).

2^1340837 is an apocalyptic number.

It is an amenable number.

1340837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340837 is an equidigital number, since it uses as much as digits as its factorization.

1340837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1340837 is about 1157.9451627776. The cubic root of 1340837 is about 110.2703268585.

The spelling of 1340837 in words is "one million, three hundred forty thousand, eight hundred thirty-seven".