1851166 has 8 divisors (see below), whose sum is σ = 2801664. Its totient is φ = 917280.

The previous prime is 1851163. The next prime is 1851173. The reversal of 1851166 is 6611581.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3870 + ... + 4321.

It is an arithmetic number, because the mean of its divisors is an integer number (350208).

2^1851166 is an apocalyptic number.

1851166 is a deficient number, since it is larger than the sum of its proper divisors (950498).

1851166 is a wasteful number, since it uses less digits than its factorization.

1851166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8306.

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

The square root of 1851166 is about 1360.5756134813. The cubic root of 1851166 is about 122.7858878838.

The spelling of 1851166 in words is "one million, eight hundred fifty-one thousand, one hundred sixty-six".