865057841 has 4 divisors (see below), whose sum is σ = 867028800. Its totient is φ = 863086884.

The previous prime is 865057799. The next prime is 865057847. The reversal of 865057841 is 148750568.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865057841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 865057792 and 865057801.

It is not an unprimeable number, because it can be changed into a prime (865057847) 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 3 ways as a sum of consecutive naturals, for example, 984821 + ... + 985698.

It is an arithmetic number, because the mean of its divisors is an integer number (216757200).

Almost surely, 2^865057841 is an apocalyptic number.

It is an amenable number.

865057841 is a deficient number, since it is larger than the sum of its proper divisors (1970959).

865057841 is a wasteful number, since it uses less digits than its factorization.

865057841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970958.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 865057841 is about 29411.8656497680. The cubic root of 865057841 is about 952.8291805012.

The spelling of 865057841 in words is "eight hundred sixty-five million, fifty-seven thousand, eight hundred forty-one".