1006861 has 2 divisors, whose sum is σ = 1006862. Its totient is φ = 1006860.

The previous prime is 1006853. The next prime is 1006877. The reversal of 1006861 is 1686001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609961 + 396900 = 781^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1006861 - 2³ = 1006853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1006891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503430 + 503431.

It is an arithmetic number, because the mean of its divisors is an integer number (503431).

2^1006861 is an apocalyptic number.

It is an amenable number.

1006861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006861 is an equidigital number, since it uses as much as digits as its factorization.

1006861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1006861 is about 1003.4246359344. The cubic root of 1006861 is about 100.2281789477.

The spelling of 1006861 in words is "one million, six thousand, eight hundred sixty-one".