625539 has 4 divisors (see below), whose sum is σ = 834056. Its totient is φ = 417024.

The previous prime is 625529. The next prime is 625543. The reversal of 625539 is 935526.

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

It is not a de Polignac number, because 625539 - 2⁵ = 625507 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625539.

It is not an unprimeable number, because it can be changed into a prime (625529) 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, 104254 + ... + 104259.

It is an arithmetic number, because the mean of its divisors is an integer number (208514).

2⁶²⁵⁵³⁹ is an apocalyptic number.

625539 is a deficient number, since it is larger than the sum of its proper divisors (208517).

625539 is a wasteful number, since it uses less digits than its factorization.

625539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208516.

The product of its digits is 8100, while the sum is 30.

The square root of 625539 is about 790.9102351089. The cubic root of 625539 is about 85.5233683261.

The spelling of 625539 in words is "six hundred twenty-five thousand, five hundred thirty-nine".