2718161 has 4 divisors (see below), whose sum is σ = 2727732. Its totient is φ = 2708592.

The previous prime is 2718143. The next prime is 2718169. The reversal of 2718161 is 1618172.

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 2421136 + 297025 = 1556^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 2718161 - 2⁶ = 2718097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2718161.

It is not an unprimeable number, because it can be changed into a prime (2718169) 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, 4346 + ... + 4931.

It is an arithmetic number, because the mean of its divisors is an integer number (681933).

2^2718161 is an apocalyptic number.

It is an amenable number.

2718161 is a deficient number, since it is larger than the sum of its proper divisors (9571).

2718161 is an equidigital number, since it uses as much as digits as its factorization.

2718161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9570.

The product of its digits is 672, while the sum is 26.

The square root of 2718161 is about 1648.6846272104. The cubic root of 2718161 is about 139.5591746313.

The spelling of 2718161 in words is "two million, seven hundred eighteen thousand, one hundred sixty-one".