2140165 has 4 divisors (see below), whose sum is σ = 2568204. Its totient is φ = 1712128.

The previous prime is 2140163. The next prime is 2140169. The reversal of 2140165 is 5610412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 244036 + 1896129 = 494^2 + 1377^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140165 - 2¹ = 2140163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214012 + ... + 214021.

It is an arithmetic number, because the mean of its divisors is an integer number (642051).

2^2140165 is an apocalyptic number.

It is an amenable number.

2140165 is a deficient number, since it is larger than the sum of its proper divisors (428039).

2140165 is an equidigital number, since it uses as much as digits as its factorization.

2140165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428038.

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

The square root of 2140165 is about 1462.9302785847. The cubic root of 2140165 is about 128.8691861425.

Adding to 2140165 its reverse (5610412), we get a palindrome (7750577).

It can be divided in two parts, 21 and 40165, that added together give a triangular number (40186 = T₂₈₃).

The spelling of 2140165 in words is "two million, one hundred forty thousand, one hundred sixty-five".