625505 has 4 divisors (see below), whose sum is σ = 750612. Its totient is φ = 500400.

The previous prime is 625489. The next prime is 625507. The reversal of 625505 is 505526.

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 421201 + 204304 = 649^2 + 452^2 .

It is not a de Polignac number, because 625505 - 2⁴ = 625489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625505.

It is not an unprimeable number, because it can be changed into a prime (625507) 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, 62546 + ... + 62555.

It is an arithmetic number, because the mean of its divisors is an integer number (187653).

2⁶²⁵⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

625505 is a deficient number, since it is larger than the sum of its proper divisors (125107).

625505 is a wasteful number, since it uses less digits than its factorization.

625505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125106.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 625505 is about 790.8887405950. Note that the first 3 decimals coincide. The cubic root of 625505 is about 85.5218188106.

The spelling of 625505 in words is "six hundred twenty-five thousand, five hundred five".