1861042841 has 16 divisors (see below), whose sum is σ = 2193454080. Its totient is φ = 1546031760.

The previous prime is 1861042811. The next prime is 1861042889. The reversal of 1861042841 is 1482401681.

It is a happy number.

It is not a de Polignac number, because 1861042841 - 2¹⁸ = 1860780697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1861042811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2411 + ... + 61056.

It is an arithmetic number, because the mean of its divisors is an integer number (137090880).

Almost surely, 2^1861042841 is an apocalyptic number.

It is an amenable number.

1861042841 is a deficient number, since it is larger than the sum of its proper divisors (332411239).

1861042841 is an equidigital number, since it uses as much as digits as its factorization.

1861042841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63604.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 1861042841 is about 43139.8057598780. The cubic root of 1861042841 is about 1230.0387413712.

The spelling of 1861042841 in words is "one billion, eight hundred sixty-one million, forty-two thousand, eight hundred forty-one".