1000181 has 16 divisors (see below), whose sum is σ = 1276800. Its totient is φ = 762048.

The previous prime is 1000171. The next prime is 1000183. The reversal of 1000181 is 1810001.

It is not a de Polignac number, because 1000181 - 2⁶ = 1000117 is a prime.

It is a super-2 number, since 2×1000181² = 2000724065522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2450 + ... + 2828.

It is an arithmetic number, because the mean of its divisors is an integer number (79800).

2^1000181 is an apocalyptic number.

It is an amenable number.

1000181 is a deficient number, since it is larger than the sum of its proper divisors (276619).

1000181 is a wasteful number, since it uses less digits than its factorization.

1000181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

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

The square root of 1000181 is about 1000.0904959052. The cubic root of 1000181 is about 100.0060329694.

Adding to 1000181 its reverse (1810001), we get a palindrome (2810182).

The spelling of 1000181 in words is "one million, one hundred eighty-one", and thus it is an aban number.