1854561 has 8 divisors (see below), whose sum is σ = 2479680. Its totient is φ = 1232912.

The previous prime is 1854529. The next prime is 1854563. The reversal of 1854561 is 1654581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1854561 - 2⁵ = 1854529 is a prime.

It is an alternating number because its digits alternate between odd and even.

1854561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1854563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (309960).

2^1854561 is an apocalyptic number.

It is an amenable number.

1854561 is a deficient number, since it is larger than the sum of its proper divisors (625119).

1854561 is a wasteful number, since it uses less digits than its factorization.

1854561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735.

The product of its digits is 4800, while the sum is 30.

The square root of 1854561 is about 1361.8226756814. The cubic root of 1854561 is about 122.8609042991.

It can be divided in two parts, 1854 and 561, that added together give a triangular number (2415 = T₆₉).

The spelling of 1854561 in words is "one million, eight hundred fifty-four thousand, five hundred sixty-one".