1855201 has 4 divisors (see below), whose sum is σ = 1861552. Its totient is φ = 1848852.

The previous prime is 1855187. The next prime is 1855207. The reversal of 1855201 is 1025581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1855201 - 2⁵ = 1855169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1855207) 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 3 ways as a sum of consecutive naturals, for example, 2715 + ... + 3328.

It is an arithmetic number, because the mean of its divisors is an integer number (465388).

2^1855201 is an apocalyptic number.

It is an amenable number.

1855201 is a deficient number, since it is larger than the sum of its proper divisors (6351).

1855201 is an equidigital number, since it uses as much as digits as its factorization.

1855201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6350.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1855201 is about 1362.0576346102. The cubic root of 1855201 is about 122.8750355742.

The spelling of 1855201 in words is "one million, eight hundred fifty-five thousand, two hundred one".