625565 has 4 divisors (see below), whose sum is σ = 750684. Its totient is φ = 500448.

The previous prime is 625543. The next prime is 625589. The reversal of 625565 is 565526.

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 91204 + 534361 = 302^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 625565 - 2¹⁰ = 624541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62552 + ... + 62561.

It is an arithmetic number, because the mean of its divisors is an integer number (187671).

2⁶²⁵⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

625565 is a deficient number, since it is larger than the sum of its proper divisors (125119).

625565 is a wasteful number, since it uses less digits than its factorization.

625565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125118.

The product of its digits is 9000, while the sum is 29.

The square root of 625565 is about 790.9266716959. The cubic root of 625565 is about 85.5245532119.

The spelling of 625565 in words is "six hundred twenty-five thousand, five hundred sixty-five".