1980625 has 10 divisors (see below), whose sum is σ = 2475770. Its totient is φ = 1584000.

The previous prime is 1980607. The next prime is 1980631. The reversal of 1980625 is 5260891.

It can be written as a sum of positive squares in 5 ways, for example, as 452929 + 1527696 = 673^2 + 1236^2 .

It is not a de Polignac number, because 1980625 - 2⁹ = 1980113 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 960 + ... + 2209.

It is an arithmetic number, because the mean of its divisors is an integer number (247577).

2^1980625 is an apocalyptic number.

It is an amenable number.

1980625 is a deficient number, since it is larger than the sum of its proper divisors (495145).

1980625 is an frugal number, since it uses more digits than its factorization.

1980625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189 (or 3174 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1980625 is about 1407.3467945038. The cubic root of 1980625 is about 125.5839345822.

The spelling of 1980625 in words is "one million, nine hundred eighty thousand, six hundred twenty-five".