161112137 has 8 divisors (see below), whose sum is σ = 163792200. Its totient is φ = 158454144.

The previous prime is 161112121. The next prime is 161112157. The reversal of 161112137 is 731211161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38987536 + 122124601 = 6244^2 + 11051^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161112137 - 2⁴ = 161112121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161112157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9539 + ... + 20327.

It is an arithmetic number, because the mean of its divisors is an integer number (20474025).

Almost surely, 2^161112137 is an apocalyptic number.

It is an amenable number.

161112137 is a deficient number, since it is larger than the sum of its proper divisors (2680063).

161112137 is a wasteful number, since it uses less digits than its factorization.

161112137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11035.

The product of its digits is 252, while the sum is 23.

The square root of 161112137 is about 12692.9955881187. The cubic root of 161112137 is about 544.1384552878.

Adding to 161112137 its reverse (731211161), we get a palindrome (892323298).

The spelling of 161112137 in words is "one hundred sixty-one million, one hundred twelve thousand, one hundred thirty-seven".