84242591 has 8 divisors (see below), whose sum is σ = 85063680. Its totient is φ = 83425752.

The previous prime is 84242573. The next prime is 84242603. The reversal of 84242591 is 19524248.

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 84242591 - 2¹⁸ = 83980447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84242551) 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 7 ways as a sum of consecutive naturals, for example, 49826 + ... + 51488.

It is an arithmetic number, because the mean of its divisors is an integer number (10632960).

Almost surely, 2^84242591 is an apocalyptic number.

84242591 is a deficient number, since it is larger than the sum of its proper divisors (821089).

84242591 is a wasteful number, since it uses less digits than its factorization.

84242591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125.

The product of its digits is 23040, while the sum is 35.

The square root of 84242591 is about 9178.3762725223. The cubic root of 84242591 is about 438.3731087514.

The spelling of 84242591 in words is "eighty-four million, two hundred forty-two thousand, five hundred ninety-one".