1011005 has 4 divisors (see below), whose sum is σ = 1213212. Its totient is φ = 808800.

The previous prime is 1011001. The next prime is 1011013. The reversal of 1011005 is 5001101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5001101 = 7 ⋅714443.

It can be written as a sum of positive squares in 2 ways, for example, as 188356 + 822649 = 434^2 + 907^2 .

It is not a de Polignac number, because 1011005 - 2² = 1011001 is a prime.

It is a super-2 number, since 2×1011005² = 2044262220050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1010983 and 1011001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101096 + ... + 101105.

It is an arithmetic number, because the mean of its divisors is an integer number (303303).

2^1011005 is an apocalyptic number.

It is an amenable number.

1011005 is a deficient number, since it is larger than the sum of its proper divisors (202207).

1011005 is an equidigital number, since it uses as much as digits as its factorization.

1011005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202206.

The product of its (nonzero) digits is 5, while the sum is 8.

The square root of 1011005 is about 1005.4874439793. The cubic root of 1011005 is about 100.3654958338.

Adding to 1011005 its reverse (5001101), we get a palindrome (6012106).

The spelling of 1011005 in words is "one million, eleven thousand, five".