70985 has 4 divisors (see below), whose sum is σ = 85188. Its totient is φ = 56784.

The previous prime is 70981. The next prime is 70991. The reversal of 70985 is 58907.

70985 = T₁₆₆ + T₁₆₇ + ... + T₁₇₀.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53824 + 17161 = 232^2 + 131^2 .

It is a cyclic number.

It is not a de Polignac number, because 70985 - 2² = 70981 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 70985.

It is not an unprimeable number, because it can be changed into a prime (70981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7094 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (21297).

2⁷⁰⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

70985 is a deficient number, since it is larger than the sum of its proper divisors (14203).

70985 is a wasteful number, since it uses less digits than its factorization.

70985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14202.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 70985 is about 266.4301034043. The cubic root of 70985 is about 41.4052612200.

The spelling of 70985 in words is "seventy thousand, nine hundred eighty-five".