1980225 has 36 divisors (see below), whose sum is σ = 3825276. Its totient is φ = 973440.

The previous prime is 1980221. The next prime is 1980227. The reversal of 1980225 is 5220891.

It can be written as a sum of positive squares in 6 ways, for example, as 576 + 1979649 = 24^2 + 1407^2 .

It is not a de Polignac number, because 1980225 - 2² = 1980221 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980221) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 2587 + ... + 3263.

2^1980225 is an apocalyptic number.

1980225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1980225 is a deficient number, since it is larger than the sum of its proper divisors (1845051).

1980225 is a wasteful number, since it uses less digits than its factorization.

1980225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1980225 is about 1407.2046759445. The cubic root of 1980225 is about 125.5754798510.

The spelling of 1980225 in words is "one million, nine hundred eighty thousand, two hundred twenty-five".