622705 has 4 divisors (see below), whose sum is σ = 747252. Its totient is φ = 498160.

The previous prime is 622669. The next prime is 622709. The reversal of 622705 is 507226.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 507226 = 2 ⋅253613.

It can be written as a sum of positive squares in 2 ways, for example, as 69169 + 553536 = 263^2 + 744^2 .

It is not a de Polignac number, because 622705 - 2⁷ = 622577 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

622705 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (622709) 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, 62266 + ... + 62275.

It is an arithmetic number, because the mean of its divisors is an integer number (186813).

2⁶²²⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

622705 is a deficient number, since it is larger than the sum of its proper divisors (124547).

622705 is a wasteful number, since it uses less digits than its factorization.

622705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124546.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 622705 is about 789.1165946804. The cubic root of 622705 is about 85.3940184517.

The spelling of 622705 in words is "six hundred twenty-two thousand, seven hundred five".