1000081 has 2 divisors, whose sum is σ = 1000082. Its totient is φ = 1000080.

The previous prime is 1000039. The next prime is 1000099. The reversal of 1000081 is 1800001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1000000 + 81 = 1000^2 + 9^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000081 - 2⁷ = 999953 is a prime.

It is a super-2 number, since 2×1000081² = 2000324013122, which contains 22 as substring.

It is a plaindrome in base 7.

It is not a weakly prime, because it can be changed into another prime (1000381) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500040 + 500041.

It is an arithmetic number, because the mean of its divisors is an integer number (500041).

2^1000081 is an apocalyptic number.

It is an amenable number.

1000081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000081 is an equidigital number, since it uses as much as digits as its factorization.

1000081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1000081 is about 1000.0404991799. The cubic root of 1000081 is about 100.0026999271.

Adding to 1000081 its reverse (1800001), we get a palindrome (2800082).

It can be divided in two parts, 10000 and 81, that multiplied together give a 4-th power (810000 = 30⁴).

The spelling of 1000081 in words is "one million, eighty-one", and thus it is an aban number and an uban number.