625557 has 4 divisors (see below), whose sum is σ = 834080. Its totient is φ = 417036.

The previous prime is 625543. The next prime is 625589. The reversal of 625557 is 755526.

625557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 625557 - 2¹² = 621461 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

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, 104257 + ... + 104262.

It is an arithmetic number, because the mean of its divisors is an integer number (208520).

2⁶²⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

625557 is a deficient number, since it is larger than the sum of its proper divisors (208523).

625557 is a wasteful number, since it uses less digits than its factorization.

625557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208522.

The product of its digits is 10500, while the sum is 30.

The square root of 625557 is about 790.9216143209. The cubic root of 625557 is about 85.5241886351.

The spelling of 625557 in words is "six hundred twenty-five thousand, five hundred fifty-seven".