1340747 has 2 divisors, whose sum is σ = 1340748. Its totient is φ = 1340746.

The previous prime is 1340743. The next prime is 1340749. The reversal of 1340747 is 7470431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1340747 - 2² = 1340743 is a prime.

Together with 1340749, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1340743) 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, 670373 + 670374.

It is an arithmetic number, because the mean of its divisors is an integer number (670374).

2^1340747 is an apocalyptic number.

1340747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340747 is an equidigital number, since it uses as much as digits as its factorization.

1340747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 1340747 is about 1157.9063001815. The cubic root of 1340747 is about 110.2678596057.

The spelling of 1340747 in words is "one million, three hundred forty thousand, seven hundred forty-seven".