2001161 has 8 divisors (see below), whose sum is σ = 2104704. Its totient is φ = 1899040.

The previous prime is 2001127. The next prime is 2001163. The reversal of 2001161 is 1611002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001161 - 2¹⁴ = 1984777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3581 + ... + 4101.

It is an arithmetic number, because the mean of its divisors is an integer number (263088).

2^2001161 is an apocalyptic number.

It is an amenable number.

2001161 is a deficient number, since it is larger than the sum of its proper divisors (103543).

2001161 is a wasteful number, since it uses less digits than its factorization.

2001161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2001161 is about 1414.6239783066. The cubic root of 2001161 is about 126.0164797459.

Adding to 2001161 its reverse (1611002), we get a palindrome (3612163).

The spelling of 2001161 in words is "two million, one thousand, one hundred sixty-one".