1845649 has 12 divisors (see below), whose sum is σ = 2040816. Its totient is φ = 1667952.

The previous prime is 1845637. The next prime is 1845713. The reversal of 1845649 is 9465481.

It is a happy number.

It is not a de Polignac number, because 1845649 - 2⁷ = 1845521 is a prime.

It is a Duffinian number.

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 1845649 = 42³ + 121³ = 49³ + 120³.

Its product of digits (34560) is a multiple of the sum of its prime factors (256).

It is not an unprimeable number, because it can be changed into a prime (1845049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11242 + ... + 11404.

It is an arithmetic number, because the mean of its divisors is an integer number (170068).

2^1845649 is an apocalyptic number.

It is an amenable number.

1845649 is a deficient number, since it is larger than the sum of its proper divisors (195167).

1845649 is a wasteful number, since it uses less digits than its factorization.

1845649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 243 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 1845649 is about 1358.5466499167. The cubic root of 1845649 is about 122.6637875755.

It can be divided in two parts, 1 and 845649, that added together give a triangular number (845650 = T₁₃₀₀).

The spelling of 1845649 in words is "one million, eight hundred forty-five thousand, six hundred forty-nine".