2045161 has 4 divisors (see below), whose sum is σ = 2057872. Its totient is φ = 2032452.

The previous prime is 2045129. The next prime is 2045177. The reversal of 2045161 is 1615402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2045161 - 2⁵ = 2045129 is a prime.

It is a Duffinian number.

2045161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2045191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6111 + ... + 6436.

It is an arithmetic number, because the mean of its divisors is an integer number (514468).

2^2045161 is an apocalyptic number.

It is an amenable number.

2045161 is a deficient number, since it is larger than the sum of its proper divisors (12711).

2045161 is a wasteful number, since it uses less digits than its factorization.

2045161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12710.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2045161 is about 1430.0912558295. The cubic root of 2045161 is about 126.9333769231.

The spelling of 2045161 in words is "two million, forty-five thousand, one hundred sixty-one".