1340861 has 2 divisors, whose sum is σ = 1340862. Its totient is φ = 1340860.

The previous prime is 1340837. The next prime is 1340879. The reversal of 1340861 is 1680431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1038361 + 302500 = 1019^2 + 550^2 .

It is an emirp because it is prime and its reverse (1680431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340861 - 2⁶ = 1340797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670430 + 670431.

It is an arithmetic number, because the mean of its divisors is an integer number (670431).

2^1340861 is an apocalyptic number.

It is an amenable number.

1340861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340861 is an equidigital number, since it uses as much as digits as its factorization.

1340861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1340861 is about 1157.9555259163. The cubic root of 1340861 is about 110.2709847739.

The spelling of 1340861 in words is "one million, three hundred forty thousand, eight hundred sixty-one".