85420071 has 18 divisors (see below), whose sum is σ = 135622760. Its totient is φ = 51769080.

The previous prime is 85420039. The next prime is 85420079. The reversal of 85420071 is 17002458.

It is not a de Polignac number, because 85420071 - 2⁵ = 85420039 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 (85420079) 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 17 ways as a sum of consecutive naturals, for example, 38131 + ... + 40308.

Almost surely, 2^85420071 is an apocalyptic number.

85420071 is a deficient number, since it is larger than the sum of its proper divisors (50202689).

85420071 is a wasteful number, since it uses less digits than its factorization.

85420071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78467 (or 78453 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 85420071 is about 9242.2979285457. The cubic root of 85420071 is about 440.4060834368.

The spelling of 85420071 in words is "eighty-five million, four hundred twenty thousand, seventy-one".