1865925 has 18 divisors (see below), whose sum is σ = 3342482. Its totient is φ = 995040.

The previous prime is 1865917. The next prime is 1865939. The reversal of 1865925 is 5295681.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 19044 + 1846881 = 138^2 + 1359^2 .

It is not a de Polignac number, because 1865925 - 2³ = 1865917 is a prime.

It is a super-2 number, since 2×1865925² = 6963352211250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1865925.

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 17 ways as a sum of consecutive naturals, for example, 3922 + ... + 4371.

2^1865925 is an apocalyptic number.

1865925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1865925 is a deficient number, since it is larger than the sum of its proper divisors (1476557).

1865925 is a wasteful number, since it uses less digits than its factorization.

1865925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8309 (or 8301 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1865925 is about 1365.9886529543. The cubic root of 1865925 is about 123.1113407851. Note that the first 3 decimals are identical.

The spelling of 1865925 in words is "one million, eight hundred sixty-five thousand, nine hundred twenty-five".