4157161 has 4 divisors (see below), whose sum is σ = 4235652. Its totient is φ = 4078672.

The previous prime is 4157159. The next prime is 4157171. The reversal of 4157161 is 1617514.

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 1907161 + 2250000 = 1381^2 + 1500^2 .

It is a cyclic number.

It is not a de Polignac number, because 4157161 - 2¹ = 4157159 is a prime.

It is a Duffinian number.

4157161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4157141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39166 + ... + 39271.

It is an arithmetic number, because the mean of its divisors is an integer number (1058913).

Almost surely, 2^4157161 is an apocalyptic number.

It is an amenable number.

4157161 is a deficient number, since it is larger than the sum of its proper divisors (78491).

4157161 is an equidigital number, since it uses as much as digits as its factorization.

4157161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78490.

The product of its digits is 840, while the sum is 25.

The square root of 4157161 is about 2038.9117195210. The cubic root of 4157161 is about 160.7924359907.

The spelling of 4157161 in words is "four million, one hundred fifty-seven thousand, one hundred sixty-one".