1800055 has 8 divisors (see below), whose sum is σ = 2167344. Its totient is φ = 1435200.

The previous prime is 1800047. The next prime is 1800067. The reversal of 1800055 is 5500081.

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

It is not a de Polignac number, because 1800055 - 2³ = 1800047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2260 + ... + 2950.

It is an arithmetic number, because the mean of its divisors is an integer number (270918).

2^1800055 is an apocalyptic number.

1800055 is a deficient number, since it is larger than the sum of its proper divisors (367289).

1800055 is an equidigital number, since it uses as much as digits as its factorization.

1800055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1800055 is about 1341.6612836331. The cubic root of 1800055 is about 121.6452788659.

The spelling of 1800055 in words is "one million, eight hundred thousand, fifty-five".