2622605 has 4 divisors (see below), whose sum is σ = 3147132. Its totient is φ = 2098080.

The previous prime is 2622601. The next prime is 2622611. The reversal of 2622605 is 5062262.

It is a happy number.

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 885481 + 1737124 = 941^2 + 1318^2 .

It is not a de Polignac number, because 2622605 - 2² = 2622601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2622601) 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, 262256 + ... + 262265.

It is an arithmetic number, because the mean of its divisors is an integer number (786783).

2^2622605 is an apocalyptic number.

It is an amenable number.

2622605 is a deficient number, since it is larger than the sum of its proper divisors (524527).

2622605 is an equidigital number, since it uses as much as digits as its factorization.

2622605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524526.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2622605 is about 1619.4458928905. The cubic root of 2622605 is about 137.9042428890.

Adding to 2622605 its reverse (5062262), we get a palindrome (7684867).

The spelling of 2622605 in words is "two million, six hundred twenty-two thousand, six hundred five".