2162749 has 4 divisors (see below), whose sum is σ = 2166364. Its totient is φ = 2159136.

The previous prime is 2162747. The next prime is 2162803. The reversal of 2162749 is 9472612.

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 1397124 + 765625 = 1182^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 2162749 - 2¹ = 2162747 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2³ + 1 + 6² + 2²¹ + 7 + 4⁸ + 9 .

It is a Duffinian number.

2162749 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2162749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162747) 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, 672 + ... + 2185.

It is an arithmetic number, because the mean of its divisors is an integer number (541591).

2^2162749 is an apocalyptic number.

It is an amenable number.

2162749 is a deficient number, since it is larger than the sum of its proper divisors (3615).

2162749 is an equidigital number, since it uses as much as digits as its factorization.

2162749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614.

The product of its digits is 6048, while the sum is 31.

The square root of 2162749 is about 1470.6287770882. The cubic root of 2162749 is about 129.3208964966.

The spelling of 2162749 in words is "two million, one hundred sixty-two thousand, seven hundred forty-nine".