1845115 has 4 divisors (see below), whose sum is σ = 2214144. Its totient is φ = 1476088.

The previous prime is 1845073. The next prime is 1845119. The reversal of 1845115 is 5115481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5115481 = 7 ⋅730783.

It is a cyclic number.

It is not a de Polignac number, because 1845115 - 2⁷ = 1844987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1845115.

It is not an unprimeable number, because it can be changed into a prime (1845119) 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, 184507 + ... + 184516.

It is an arithmetic number, because the mean of its divisors is an integer number (553536).

2^1845115 is an apocalyptic number.

1845115 is a deficient number, since it is larger than the sum of its proper divisors (369029).

1845115 is an equidigital number, since it uses as much as digits as its factorization.

1845115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369028.

The product of its digits is 800, while the sum is 25.

The square root of 1845115 is about 1358.3501021460. The cubic root of 1845115 is about 122.6519563659.

The spelling of 1845115 in words is "one million, eight hundred forty-five thousand, one hundred fifteen".