622543 has 4 divisors (see below), whose sum is σ = 644040. Its totient is φ = 601048.

The previous prime is 622529. The next prime is 622547. The reversal of 622543 is 345226.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622547) 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, 10705 + ... + 10762.

It is an arithmetic number, because the mean of its divisors is an integer number (161010).

2⁶²²⁵⁴³ is an apocalyptic number.

622543 is a deficient number, since it is larger than the sum of its proper divisors (21497).

622543 is a wasteful number, since it uses less digits than its factorization.

622543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21496.

The product of its digits is 1440, while the sum is 22.

The square root of 622543 is about 789.0139415752. The cubic root of 622543 is about 85.3866125742.

Subtracting from 622543 its sum of digits (22), we obtain a square (622521 = 789²).

Adding to 622543 its reverse (345226), we get a palindrome (967769).

The spelling of 622543 in words is "six hundred twenty-two thousand, five hundred forty-three".