1001081 has 2 divisors, whose sum is σ = 1001082. Its totient is φ = 1001080.

The previous prime is 1001069. The next prime is 1001087. The reversal of 1001081 is 1801001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 885481 + 115600 = 941^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001081 - 2⁶ = 1001017 is a prime.

It is a super-2 number, since 2×1001081² = 2004326337122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1001087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500540 + 500541.

It is an arithmetic number, because the mean of its divisors is an integer number (500541).

2^1001081 is an apocalyptic number.

It is an amenable number.

1001081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001081 is an equidigital number, since it uses as much as digits as its factorization.

1001081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1001081 is about 1000.5403540088. The cubic root of 1001081 is about 100.0360203571.

Adding to 1001081 its reverse (1801001), we get a palindrome (2802082).

The spelling of 1001081 in words is "one million, one thousand, eighty-one".