1863145 has 4 divisors (see below), whose sum is σ = 2235780. Its totient is φ = 1490512.

The previous prime is 1863107. The next prime is 1863151. The reversal of 1863145 is 5413681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1432809 + 430336 = 1197^2 + 656^2 .

It is a cyclic number.

It is not a de Polignac number, because 1863145 - 2⁹ = 1862633 is a prime.

It is an unprimeable number.

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, 186310 + ... + 186319.

It is an arithmetic number, because the mean of its divisors is an integer number (558945).

2^1863145 is an apocalyptic number.

It is an amenable number.

1863145 is a deficient number, since it is larger than the sum of its proper divisors (372635).

1863145 is an equidigital number, since it uses as much as digits as its factorization.

1863145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372634.

The product of its digits is 2880, while the sum is 28.

The square root of 1863145 is about 1364.9706956561. The cubic root of 1863145 is about 123.0501701167.

The spelling of 1863145 in words is "one million, eight hundred sixty-three thousand, one hundred forty-five".