1844561 has 4 divisors (see below), whose sum is σ = 1894452. Its totient is φ = 1794672.

The previous prime is 1844537. The next prime is 1844567. The reversal of 1844561 is 1654481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1654481 = 101 ⋅16381.

It can be written as a sum of positive squares in 2 ways, for example, as 1000000 + 844561 = 1000^2 + 919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1844561 - 2⁶ = 1844497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1844567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24890 + ... + 24963.

It is an arithmetic number, because the mean of its divisors is an integer number (473613).

2^1844561 is an apocalyptic number.

It is an amenable number.

1844561 is a deficient number, since it is larger than the sum of its proper divisors (49891).

1844561 is an equidigital number, since it uses as much as digits as its factorization.

1844561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49890.

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

The square root of 1844561 is about 1358.1461629736. The cubic root of 1844561 is about 122.6396796269.

The spelling of 1844561 in words is "one million, eight hundred forty-four thousand, five hundred sixty-one".