85121059 has 2 divisors, whose sum is σ = 85121060. Its totient is φ = 85121058.

The previous prime is 85121051. The next prime is 85121087. The reversal of 85121059 is 95012158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85121059 - 2³ = 85121051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85121059.

It is not a weakly prime, because it can be changed into another prime (85121051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42560529 + 42560530.

It is an arithmetic number, because the mean of its divisors is an integer number (42560530).

Almost surely, 2^85121059 is an apocalyptic number.

85121059 is a deficient number, since it is larger than the sum of its proper divisors (1).

85121059 is an equidigital number, since it uses as much as digits as its factorization.

85121059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 85121059 is about 9226.1074673992. The cubic root of 85121059 is about 439.8916038079.

The spelling of 85121059 in words is "eighty-five million, one hundred twenty-one thousand, fifty-nine".