625040 has 40 divisors (see below), whose sum is σ = 1567608. Its totient is φ = 230400.

The previous prime is 625033. The next prime is 625057. The reversal of 625040 is 40526.

It can be written as a sum of positive squares in 4 ways, for example, as 59536 + 565504 = 244^2 + 752^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740 + ... + 1340.

625040 is a Friedman number, since it can be written as 40*(5^6+2^0), using all its digits and the basic arithmetic operations.

2⁶²⁵⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783804).

625040 is an abundant number, since it is smaller than the sum of its proper divisors (942568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

625040 is a wasteful number, since it uses less digits than its factorization.

625040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 625040 is about 790.5947128586. The cubic root of 625040 is about 85.5006212693.

Adding to 625040 its reverse (40526), we get a palindrome (665566).

It can be divided in two parts, 6250 and 40, that multiplied together give a square (250000 = 500²).

The spelling of 625040 in words is "six hundred twenty-five thousand, forty".