1864145 has 4 divisors (see below), whose sum is σ = 2236980. Its totient is φ = 1491312.

The previous prime is 1864117. The next prime is 1864151. The reversal of 1864145 is 5414681.

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 1423249 + 440896 = 1193^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1864145 - 2⁸ = 1863889 is a prime.

It is an unprimeable number.

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, 186410 + ... + 186419.

It is an arithmetic number, because the mean of its divisors is an integer number (559245).

2^1864145 is an apocalyptic number.

It is an amenable number.

1864145 is a deficient number, since it is larger than the sum of its proper divisors (372835).

1864145 is an equidigital number, since it uses as much as digits as its factorization.

1864145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372834.

The product of its digits is 3840, while the sum is 29.

The square root of 1864145 is about 1365.3369547478. The cubic root of 1864145 is about 123.0721809571.

The spelling of 1864145 in words is "one million, eight hundred sixty-four thousand, one hundred forty-five".