1340047 has 2 divisors, whose sum is σ = 1340048. Its totient is φ = 1340046.

The previous prime is 1340041. The next prime is 1340069. The reversal of 1340047 is 7400431.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340047 - 2³ = 1340039 is a prime.

1340047 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340041) 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, 670023 + 670024.

It is an arithmetic number, because the mean of its divisors is an integer number (670024).

2^1340047 is an apocalyptic number.

1340047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340047 is an equidigital number, since it uses as much as digits as its factorization.

1340047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 1340047 is about 1157.6039910090. The cubic root of 1340047 is about 110.2486660918.

Adding to 1340047 its reverse (7400431), we get a palindrome (8740478).

The spelling of 1340047 in words is "one million, three hundred forty thousand, forty-seven".