1855045 has 8 divisors (see below), whose sum is σ = 2280600. Its totient is φ = 1447680.

The previous prime is 1855039. The next prime is 1855093. The reversal of 1855045 is 5405581.

It is a Cunningham number, because it is equal to 1362²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 88804 + 1766241 = 298^2 + 1329^2 .

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

It is not a de Polignac number, because 1855045 - 2⁵ = 1855013 is a prime.

It is a plaindrome in base 15.

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, 4320 + ... + 4729.

It is an arithmetic number, because the mean of its divisors is an integer number (285075).

2^1855045 is an apocalyptic number.

It is an amenable number.

1855045 is a deficient number, since it is larger than the sum of its proper divisors (425555).

1855045 is an equidigital number, since it uses as much as digits as its factorization.

1855045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9095.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 1855045 is about 1362.0003671071. Note that the first 3 decimals coincide. The cubic root of 1855045 is about 122.8715913755.

The spelling of 1855045 in words is "one million, eight hundred fifty-five thousand, forty-five".