70845 has 8 divisors (see below), whose sum is σ = 113376. Its totient is φ = 37776.

The previous prime is 70843. The next prime is 70849. The reversal of 70845 is 54807.

70845 = T₁₁₄ + T₁₁₅ + ... + T₁₂₃.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70845 - 2¹ = 70843 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

70845 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2347 + ... + 2376.

It is an arithmetic number, because the mean of its divisors is an integer number (14172).

2⁷⁰⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

70845 is a deficient number, since it is larger than the sum of its proper divisors (42531).

70845 is a wasteful number, since it uses less digits than its factorization.

70845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 70845 is about 266.1672406590. The cubic root of 70845 is about 41.3780228287.

The spelling of 70845 in words is "seventy thousand, eight hundred forty-five".