1866025 has 12 divisors (see below), whose sum is σ = 2644672. Its totient is φ = 1279440.

The previous prime is 1866019. The next prime is 1866031. The reversal of 1866025 is 5206681.

It is an interprime number because it is at equal distance from previous prime (1866019) and next prime (1866031).

It is not a de Polignac number, because 1866025 - 2¹⁵ = 1833257 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1865984 and 1866002.

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 11 ways as a sum of consecutive naturals, for example, 5157 + ... + 5506.

2^1866025 is an apocalyptic number.

It is an amenable number.

1866025 is a deficient number, since it is larger than the sum of its proper divisors (778647).

1866025 is a wasteful number, since it uses less digits than its factorization.

1866025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10680 (or 10675 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1866025 is about 1366.0252559891. The cubic root of 1866025 is about 123.1135400364.

The spelling of 1866025 in words is "one million, eight hundred sixty-six thousand, twenty-five".