1824561 has 6 divisors (see below), whose sum is σ = 2635490. Its totient is φ = 1216368.

The previous prime is 1824539. The next prime is 1824577. The reversal of 1824561 is 1654281.

It can be written as a sum of positive squares in only one way, i.e., 1806336 + 18225 = 1344^2 + 135^2 .

It is not a de Polignac number, because 1824561 - 2¹⁰ = 1823537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1824461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101356 + ... + 101373.

2^1824561 is an apocalyptic number.

It is an amenable number.

1824561 is a deficient number, since it is larger than the sum of its proper divisors (810929).

1824561 is a wasteful number, since it uses less digits than its factorization.

1824561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202735 (or 202732 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1824561 is about 1350.7631176487. The cubic root of 1824561 is about 122.1948199664.

The spelling of 1824561 in words is "one million, eight hundred twenty-four thousand, five hundred sixty-one".