3988125 has 30 divisors (see below), whose sum is σ = 7208630. Its totient is φ = 2124000.

The previous prime is 3988097. The next prime is 3988129. The reversal of 3988125 is 5218893.

It can be written as a sum of positive squares in 5 ways, for example, as 2377764 + 1610361 = 1542^2 + 1269^2 .

It is not a de Polignac number, because 3988125 - 2⁵ = 3988093 is a prime.

It is an Ulam number.

3988125 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3988125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988129) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 5271 + ... + 5979.

Almost surely, 2^3988125 is an apocalyptic number.

It is an amenable number.

3988125 is a deficient number, since it is larger than the sum of its proper divisors (3220505).

3988125 is an equidigital number, since it uses as much as digits as its factorization.

3988125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 717 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 3988125 is about 1997.0290433542. The cubic root of 3988125 is about 158.5828629272.

The spelling of 3988125 in words is "three million, nine hundred eighty-eight thousand, one hundred twenty-five".