2122765 has 8 divisors (see below), whose sum is σ = 2555640. Its totient is φ = 1692672.

The previous prime is 2122753. The next prime is 2122777. The reversal of 2122765 is 5672212.

It is an interprime number because it is at equal distance from previous prime (2122753) and next prime (2122777).

It can be written as a sum of positive squares in 4 ways, for example, as 86436 + 2036329 = 294^2 + 1427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122765 is a prime.

It is a super-2 number, since 2×2122765² = 9012262490450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁰ + 1 + 2²⁰ + 2²⁰ + 7⁵ + 6⁵ + 5 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1821 + ... + 2749.

It is an arithmetic number, because the mean of its divisors is an integer number (319455).

2^2122765 is an apocalyptic number.

It is an amenable number.

2122765 is a deficient number, since it is larger than the sum of its proper divisors (432875).

2122765 is an equidigital number, since it uses as much as digits as its factorization.

2122765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its digits is 1680, while the sum is 25.

The square root of 2122765 is about 1456.9711733593. The cubic root of 2122765 is about 128.5189906678.

Adding to 2122765 its reverse (5672212), we get a palindrome (7794977).

The spelling of 2122765 in words is "two million, one hundred twenty-two thousand, seven hundred sixty-five".