161735 has 8 divisors (see below), whose sum is σ = 221856. Its totient is φ = 110880.

The previous prime is 161731. The next prime is 161741. The reversal of 161735 is 537161.

Added to its reverse (537161) it gives a square (698896 = 836²).

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

It is not a de Polignac number, because 161735 - 2² = 161731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2276 + ... + 2345.

It is an arithmetic number, because the mean of its divisors is an integer number (27732).

2¹⁶¹⁷³⁵ is an apocalyptic number.

161735 is a deficient number, since it is larger than the sum of its proper divisors (60121).

161735 is an equidigital number, since it uses as much as digits as its factorization.

161735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633.

The product of its digits is 630, while the sum is 23.

The square root of 161735 is about 402.1629023170. The cubic root of 161735 is about 54.4838770589.

Adding to 161735 its reverse (537161), we get a palindrome (698896).

The spelling of 161735 in words is "one hundred sixty-one thousand, seven hundred thirty-five".