2126165 has 4 divisors (see below), whose sum is σ = 2551404. Its totient is φ = 1700928.

The previous prime is 2126153. The next prime is 2126167. The reversal of 2126165 is 5616212.

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 1495729 + 630436 = 1223^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126165 - 2⁴ = 2126149 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 2126165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126167) 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, 212612 + ... + 212621.

It is an arithmetic number, because the mean of its divisors is an integer number (637851).

2^2126165 is an apocalyptic number.

It is an amenable number.

2126165 is a deficient number, since it is larger than the sum of its proper divisors (425239).

2126165 is an equidigital number, since it uses as much as digits as its factorization.

2126165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425238.

The product of its digits is 720, while the sum is 23.

The square root of 2126165 is about 1458.1375106621. The cubic root of 2126165 is about 128.5875696960.

The spelling of 2126165 in words is "two million, one hundred twenty-six thousand, one hundred sixty-five".