625881 has 4 divisors (see below), whose sum is σ = 834512. Its totient is φ = 417252.

The previous prime is 625871. The next prime is 625883. The reversal of 625881 is 188526.

625881 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 625881 - 2⁹ = 625369 is a prime.

It is a super-2 number, since 2×625881² = 783454052322, which contains 22 as substring.

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 625881.

It is not an unprimeable number, because it can be changed into a prime (625883) 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, 104311 + ... + 104316.

It is an arithmetic number, because the mean of its divisors is an integer number (208628).

2⁶²⁵⁸⁸¹ is an apocalyptic number.

It is an amenable number.

625881 is a deficient number, since it is larger than the sum of its proper divisors (208631).

625881 is a wasteful number, since it uses less digits than its factorization.

625881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208630.

The product of its digits is 3840, while the sum is 30.

The square root of 625881 is about 791.1264121492. The cubic root of 625881 is about 85.5389515075.

The spelling of 625881 in words is "six hundred twenty-five thousand, eight hundred eighty-one".