70052161 has 4 divisors (see below), whose sum is σ = 70086852. Its totient is φ = 70017472.

The previous prime is 70052153. The next prime is 70052207. The reversal of 70052161 is 16125007.

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 1890625 + 68161536 = 1375^2 + 8256^2 .

It is a cyclic number.

It is not a de Polignac number, because 70052161 - 2³ = 70052153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70052131) 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 in 3 ways as a sum of consecutive naturals, for example, 14116 + ... + 18421.

It is an arithmetic number, because the mean of its divisors is an integer number (17521713).

Almost surely, 2^70052161 is an apocalyptic number.

It is an amenable number.

70052161 is a deficient number, since it is larger than the sum of its proper divisors (34691).

70052161 is a wasteful number, since it uses less digits than its factorization.

70052161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34690.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 70052161 is about 8369.7169008276. The cubic root of 70052161 is about 412.2308714042.

Adding to 70052161 its reverse (16125007), we get a palindrome (86177168).

The spelling of 70052161 in words is "seventy million, fifty-two thousand, one hundred sixty-one".