1866115 has 8 divisors (see below), whose sum is σ = 2294208. Its totient is φ = 1456320.

The previous prime is 1866113. The next prime is 1866127. The reversal of 1866115 is 5116681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1866115 - 2¹ = 1866113 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1866113) 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 7 ways as a sum of consecutive naturals, for example, 4347 + ... + 4756.

It is an arithmetic number, because the mean of its divisors is an integer number (286776).

2^1866115 is an apocalyptic number.

1866115 is a deficient number, since it is larger than the sum of its proper divisors (428093).

1866115 is an equidigital number, since it uses as much as digits as its factorization.

1866115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9149.

The product of its digits is 1440, while the sum is 28.

The square root of 1866115 is about 1366.0581978818. The cubic root of 1866115 is about 123.1155192954.

The spelling of 1866115 in words is "one million, eight hundred sixty-six thousand, one hundred fifteen".