1318161 has 16 divisors (see below), whose sum is σ = 1922816. Its totient is φ = 798336.

The previous prime is 1318157. The next prime is 1318169. The reversal of 1318161 is 1618131.

It is not a de Polignac number, because 1318161 - 2² = 1318157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1318169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2616 + ... + 3078.

It is an arithmetic number, because the mean of its divisors is an integer number (120176).

2^1318161 is an apocalyptic number.

It is an amenable number.

1318161 is a deficient number, since it is larger than the sum of its proper divisors (604655).

1318161 is a wasteful number, since it uses less digits than its factorization.

1318161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552.

The product of its digits is 144, while the sum is 21.

The square root of 1318161 is about 1148.1119283415. Note that the first 3 decimals coincide. The cubic root of 1318161 is about 109.6451651546.

The spelling of 1318161 in words is "one million, three hundred eighteen thousand, one hundred sixty-one".