622520 has 32 divisors (see below), whose sum is σ = 1425600. Its totient is φ = 244608.

The previous prime is 622519. The next prime is 622529. The reversal of 622520 is 25226.

It is a Cunningham number, because it is equal to 789²-1.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3062 + ... + 3258.

It is an arithmetic number, because the mean of its divisors is an integer number (44550).

2⁶²²⁵²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712800).

622520 is an abundant number, since it is smaller than the sum of its proper divisors (803080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

622520 is a wasteful number, since it uses less digits than its factorization.

622520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 622520 is about 788.9993662862. Note that the first 3 decimals coincide. The cubic root of 622520 is about 85.3855610183.

Adding to 622520 its reverse (25226), we get a palindrome (647746).

The spelling of 622520 in words is "six hundred twenty-two thousand, five hundred twenty".