2149161 has 16 divisors (see below), whose sum is σ = 3388800. Its totient is φ = 1185408.

The previous prime is 2149151. The next prime is 2149171. The reversal of 2149161 is 1619412.

It is an interprime number because it is at equal distance from previous prime (2149151) and next prime (2149171).

It is not a de Polignac number, because 2149161 - 2⁹ = 2148649 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2149111) 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, 1156 + ... + 2373.

It is an arithmetic number, because the mean of its divisors is an integer number (211800).

2^2149161 is an apocalyptic number.

2149161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2149161 is a deficient number, since it is larger than the sum of its proper divisors (1239639).

2149161 is a wasteful number, since it uses less digits than its factorization.

2149161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568.

The product of its digits is 432, while the sum is 24.

The square root of 2149161 is about 1466.0017053196. The cubic root of 2149161 is about 129.0494972605.

The spelling of 2149161 in words is "two million, one hundred forty-nine thousand, one hundred sixty-one".