1985425 has 24 divisors (see below), whose sum is σ = 2734200. Its totient is φ = 1420800.

The previous prime is 1985419. The next prime is 1985441. The reversal of 1985425 is 5245891.

It can be written as a sum of positive squares in 12 ways, for example, as 1763584 + 221841 = 1328^2 + 471^2 .

It is not a de Polignac number, because 1985425 - 2¹³ = 1977233 is a prime.

1985425 is a lucky number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 13251 + ... + 13399.

It is an arithmetic number, because the mean of its divisors is an integer number (113925).

2^1985425 is an apocalyptic number.

It is an amenable number.

1985425 is a deficient number, since it is larger than the sum of its proper divisors (748775).

1985425 is a wasteful number, since it uses less digits than its factorization.

1985425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 208 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The square root of 1985425 is about 1409.0510991444. The cubic root of 1985425 is about 125.6853026825.

The spelling of 1985425 in words is "one million, nine hundred eighty-five thousand, four hundred twenty-five".