2165061 has 4 divisors (see below), whose sum is σ = 2886752. Its totient is φ = 1443372.

The previous prime is 2165057. The next prime is 2165063. The reversal of 2165061 is 1605612.

It is a happy number.

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 not a de Polignac number, because 2165061 - 2² = 2165057 is a prime.

It is a D-number.

It is a Duffinian number.

2165061 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360841 + ... + 360846.

It is an arithmetic number, because the mean of its divisors is an integer number (721688).

2^2165061 is an apocalyptic number.

It is an amenable number.

2165061 is a deficient number, since it is larger than the sum of its proper divisors (721691).

2165061 is an equidigital number, since it uses as much as digits as its factorization.

2165061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721690.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2165061 is about 1471.4146254540. The cubic root of 2165061 is about 129.3669618568.

The spelling of 2165061 in words is "two million, one hundred sixty-five thousand, sixty-one".