625220 has 24 divisors (see below), whose sum is σ = 1345344. Its totient is φ = 243936.

The previous prime is 625213. The next prime is 625231. The reversal of 625220 is 22526.

625220 = T₇₅ + T₇₆ + ... + T₁₆₀.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625220.

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, 497 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (56056).

2⁶²⁵²²⁰ 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 625220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672672).

625220 is an abundant number, since it is smaller than the sum of its proper divisors (720124).

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

625220 is a wasteful number, since it uses less digits than its factorization.

625220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779 (or 777 counting only the distinct ones).

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

The square root of 625220 is about 790.7085430170. The cubic root of 625220 is about 85.5088280159.

Adding to 625220 its reverse (22526), we get a palindrome (647746).

The spelling of 625220 in words is "six hundred twenty-five thousand, two hundred twenty".