1340879 has 2 divisors, whose sum is σ = 1340880. Its totient is φ = 1340878.

The previous prime is 1340861. The next prime is 1340891. The reversal of 1340879 is 9780431.

It is a strong prime.

It is an emirp because it is prime and its reverse (9780431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340879 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 (1340179) 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, 670439 + 670440.

It is an arithmetic number, because the mean of its divisors is an integer number (670440).

2^1340879 is an apocalyptic number.

1340879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340879 is an equidigital number, since it uses as much as digits as its factorization.

1340879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1340879 is about 1157.9632982094. The cubic root of 1340879 is about 110.2714782054.

The spelling of 1340879 in words is "one million, three hundred forty thousand, eight hundred seventy-nine".