625655 has 4 divisors (see below), whose sum is σ = 750792. Its totient is φ = 500520.

The previous prime is 625643. The next prime is 625657. The reversal of 625655 is 556526.

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

It is not a de Polignac number, because 625655 - 2⁶ = 625591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625655.

It is not an unprimeable number, because it can be changed into a prime (625657) 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 3 ways as a sum of consecutive naturals, for example, 62561 + ... + 62570.

It is an arithmetic number, because the mean of its divisors is an integer number (187698).

2⁶²⁵⁶⁵⁵ is an apocalyptic number.

625655 is a deficient number, since it is larger than the sum of its proper divisors (125137).

625655 is a wasteful number, since it uses less digits than its factorization.

625655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125136.

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

The square root of 625655 is about 790.9835649367. The cubic root of 625655 is about 85.5286544860.

The spelling of 625655 in words is "six hundred twenty-five thousand, six hundred fifty-five".