70161 has 16 divisors (see below), whose sum is σ = 115584. Its totient is φ = 36864.

The previous prime is 70157. The next prime is 70163. The reversal of 70161 is 16107.

70161 is nontrivially palindromic in base 4 and base 16.

It is not a de Polignac number, because 70161 - 2² = 70157 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 70161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145 + ... + 401.

It is an arithmetic number, because the mean of its divisors is an integer number (7224).

2⁷⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

70161 is a deficient number, since it is larger than the sum of its proper divisors (45423).

70161 is a wasteful number, since it uses less digits than its factorization.

70161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 70161 is about 264.8792177578. The cubic root of 70161 is about 41.2444253256.

Adding to 70161 its reverse (16107), we get a palindrome (86268).

It can be divided in two parts, 70 and 161, that added together give a triangular number (231 = T₂₁).

The spelling of 70161 in words is "seventy thousand, one hundred sixty-one".