1988125 has 10 divisors (see below), whose sum is σ = 2485142. Its totient is φ = 1590000.

The previous prime is 1988113. The next prime is 1988137. The reversal of 1988125 is 5218891.

It is an interprime number because it is at equal distance from previous prime (1988113) and next prime (1988137).

It can be written as a sum of positive squares in 5 ways, for example, as 1279161 + 708964 = 1131^2 + 842^2 .

It is not a de Polignac number, because 1988125 - 2¹⁹ = 1463837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 966 + ... + 2215.

2^1988125 is an apocalyptic number.

It is an amenable number.

1988125 is a deficient number, since it is larger than the sum of its proper divisors (497017).

1988125 is an frugal number, since it uses more digits than its factorization.

1988125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201 (or 3186 counting only the distinct ones).

The product of its digits is 5760, while the sum is 34.

The square root of 1988125 is about 1410.0088652204. The cubic root of 1988125 is about 125.7422504569.

It can be divided in two parts, 19881 and 25, that multiplied together give a square (497025 = 705²).

The spelling of 1988125 in words is "one million, nine hundred eighty-eight thousand, one hundred twenty-five".