864221041 has 4 divisors (see below), whose sum is σ = 864314352. Its totient is φ = 864127732.

The previous prime is 864221011. The next prime is 864221047. The reversal of 864221041 is 140122468.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864221041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864221047) 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, 31015 + ... + 51868.

It is an arithmetic number, because the mean of its divisors is an integer number (216078588).

Almost surely, 2^864221041 is an apocalyptic number.

It is an amenable number.

864221041 is a deficient number, since it is larger than the sum of its proper divisors (93311).

864221041 is a wasteful number, since it uses less digits than its factorization.

864221041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93310.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 864221041 is about 29397.6366567110. The cubic root of 864221041 is about 952.5218466434.

The spelling of 864221041 in words is "eight hundred sixty-four million, two hundred twenty-one thousand, forty-one".