1306161 has 12 divisors (see below), whose sum is σ = 1997892. Its totient is φ = 819456.

The previous prime is 1306159. The next prime is 1306169. The reversal of 1306161 is 1616031.

1306161 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 2 ways, for example, as 1089936 + 216225 = 1044^2 + 465^2 .

It is not a de Polignac number, because 1306161 - 2¹ = 1306159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1306169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4116 + ... + 4421.

It is an arithmetic number, because the mean of its divisors is an integer number (166491).

2^1306161 is an apocalyptic number.

It is an amenable number.

1306161 is a deficient number, since it is larger than the sum of its proper divisors (691731).

1306161 is a wasteful number, since it uses less digits than its factorization.

1306161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8560 (or 8557 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1306161 is about 1142.8740088041. The cubic root of 1306161 is about 109.3114287452.

The spelling of 1306161 in words is "one million, three hundred six thousand, one hundred sixty-one".