1006651 has 2 divisors, whose sum is σ = 1006652. Its totient is φ = 1006650.

The previous prime is 1006637. The next prime is 1006711. The reversal of 1006651 is 1566001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1006651 - 2¹⁷ = 875579 is a prime.

1006651 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1006151) 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, 503325 + 503326.

It is an arithmetic number, because the mean of its divisors is an integer number (503326).

2^1006651 is an apocalyptic number.

1006651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006651 is an equidigital number, since it uses as much as digits as its factorization.

1006651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1006651 is about 1003.3199888371. The cubic root of 1006651 is about 100.2212102992.

The spelling of 1006651 in words is "one million, six thousand, six hundred fifty-one".