1012005 has 24 divisors (see below), whose sum is σ = 1798368. Its totient is φ = 526176.

The previous prime is 1011979. The next prime is 1012007. The reversal of 1012005 is 5002101.

It is a happy number.

It is not a de Polignac number, because 1012005 - 2⁵ = 1011973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1674 + ... + 2196.

It is an arithmetic number, because the mean of its divisors is an integer number (74932).

2^1012005 is an apocalyptic number.

1012005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1012005 is a deficient number, since it is larger than the sum of its proper divisors (786363).

1012005 is a wasteful number, since it uses less digits than its factorization.

1012005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 1012005 is about 1005.9845923273. The cubic root of 1012005 is about 100.3985759283.

Adding to 1012005 its reverse (5002101), we get a palindrome (6014106).

The spelling of 1012005 in words is "one million, twelve thousand, five".