1804745 has 4 divisors (see below), whose sum is σ = 2165700. Its totient is φ = 1443792.

The previous prime is 1804711. The next prime is 1804763. The reversal of 1804745 is 5474081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5474081 = 127 ⋅43103.

It can be written as a sum of positive squares in 2 ways, for example, as 274576 + 1530169 = 524^2 + 1237^2 .

It is a cyclic number.

It is not a de Polignac number, because 1804745 - 2⁸ = 1804489 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, 180470 + ... + 180479.

It is an arithmetic number, because the mean of its divisors is an integer number (541425).

2^1804745 is an apocalyptic number.

It is an amenable number.

1804745 is a deficient number, since it is larger than the sum of its proper divisors (360955).

1804745 is an equidigital number, since it uses as much as digits as its factorization.

1804745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360954.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 1804745 is about 1343.4079797292. The cubic root of 1804745 is about 121.7508351934.

It can be divided in two parts, 1804 and 745, that multiplied together give a triangular number (1343980 = T₁₆₃₉).

The spelling of 1804745 in words is "one million, eight hundred four thousand, seven hundred forty-five".