1162161 has 64 divisors (see below), whose sum is σ = 2365440. Its totient is φ = 544320.

The previous prime is 1162129. The next prime is 1162193. The reversal of 1162161 is 1612611.

1162161 is nontrivially palindromic in base 2.

It is an interprime number because it is at equal distance from previous prime (1162129) and next prime (1162193).

It is not a de Polignac number, because 1162161 - 2⁵ = 1162129 is a prime.

It is an Ulam number.

1162161 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1162061) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27006 + ... + 27048.

It is an arithmetic number, because the mean of its divisors is an integer number (36960).

2^1162161 is an apocalyptic number.

1162161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1162161 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1162161 is a wasteful number, since it uses less digits than its factorization.

1162161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 77 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1162161 is about 1078.0357136941. The cubic root of 1162161 is about 105.1369641207.

Adding to 1162161 its reverse (1612611), we get a palindrome (2774772).

The spelling of 1162161 in words is "one million, one hundred sixty-two thousand, one hundred sixty-one".