1681007 has 2 divisors, whose sum is σ = 1681008. Its totient is φ = 1681006.

The previous prime is 1681003. The next prime is 1681027. The reversal of 1681007 is 7001861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1681007 - 2² = 1681003 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 (1681003) 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, 840503 + 840504.

It is an arithmetic number, because the mean of its divisors is an integer number (840504).

2^1681007 is an apocalyptic number.

1681007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681007 is an equidigital number, since it uses as much as digits as its factorization.

1681007 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 23.

The square root of 1681007 is about 1296.5365401715. The cubic root of 1681007 is about 118.9021864120.

Adding to 1681007 its reverse (7001861), we get a palindrome (8682868).

The spelling of 1681007 in words is "one million, six hundred eighty-one thousand, seven".