4520161 has 4 divisors (see below), whose sum is σ = 4594324. Its totient is φ = 4446000.

The previous prime is 4520149. The next prime is 4520171. The reversal of 4520161 is 1610254.

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 891136 + 3629025 = 944^2 + 1905^2 .

It is a cyclic number.

It is not a de Polignac number, because 4520161 - 2⁵ = 4520129 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 (4520101) 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, 36990 + ... + 37111.

It is an arithmetic number, because the mean of its divisors is an integer number (1148581).

Almost surely, 2^4520161 is an apocalyptic number.

It is an amenable number.

4520161 is a deficient number, since it is larger than the sum of its proper divisors (74163).

4520161 is an equidigital number, since it uses as much as digits as its factorization.

4520161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74162.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 4520161 is about 2126.0670262247. The cubic root of 4520161 is about 165.3425512803.

The spelling of 4520161 in words is "four million, five hundred twenty thousand, one hundred sixty-one".