161752 has 8 divisors (see below), whose sum is σ = 303300. Its totient is φ = 80872.

The previous prime is 161743. The next prime is 161753. The reversal of 161752 is 257161.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161753) by changing a digit.

161752 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 10102 + ... + 10117.

2¹⁶¹⁷⁵² is an apocalyptic number.

It is an amenable number.

161752 is a deficient number, since it is larger than the sum of its proper divisors (141548).

161752 is a wasteful number, since it uses less digits than its factorization.

161752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20225 (or 20221 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 161752 is about 402.1840374754. The cubic root of 161752 is about 54.4857859293.

The spelling of 161752 in words is "one hundred sixty-one thousand, seven hundred fifty-two".