1000161 has 16 divisors (see below), whose sum is σ = 1569600. Its totient is φ = 627264.

The previous prime is 1000159. The next prime is 1000171. The reversal of 1000161 is 1610001.

1000161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1000161 - 2¹ = 1000159 is a prime.

It is a super-3 number, since 3×1000161³ = 3001449233301519843, which contains 333 as substring.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000121) 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, 631 + ... + 1548.

It is an arithmetic number, because the mean of its divisors is an integer number (98100).

2^1000161 is an apocalyptic number.

It is an amenable number.

1000161 is a deficient number, since it is larger than the sum of its proper divisors (569439).

1000161 is a wasteful number, since it uses less digits than its factorization.

1000161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205 (or 2199 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1000161 is about 1000.0804967601. The cubic root of 1000161 is about 100.0053663787.

Adding to 1000161 its reverse (1610001), we get a palindrome (2610162).

The spelling of 1000161 in words is "one million, one hundred sixty-one", and thus it is an aban number.