161738 has 16 divisors (see below), whose sum is σ = 264384. Its totient is φ = 73920.

The previous prime is 161731. The next prime is 161741. The reversal of 161738 is 837161.

It is not an unprimeable number, because it can be changed into a prime (161731) 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, 2243 + ... + 2313.

It is an arithmetic number, because the mean of its divisors is an integer number (16524).

2¹⁶¹⁷³⁸ is an apocalyptic number.

161738 is a deficient number, since it is larger than the sum of its proper divisors (102646).

161738 is a wasteful number, since it uses less digits than its factorization.

161738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157.

The product of its digits is 1008, while the sum is 26.

The square root of 161738 is about 402.1666321315. The cubic root of 161738 is about 54.4842139281.

Adding to 161738 its reverse (837161), we get a palindrome (998899).

The spelling of 161738 in words is "one hundred sixty-one thousand, seven hundred thirty-eight".