161532 has 36 divisors (see below), whose sum is σ = 467376. Its totient is φ = 46080.

The previous prime is 161531. The next prime is 161543. The reversal of 161532 is 235161.

161532 is nontrivially palindromic in base 8.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69 + ... + 572.

2¹⁶¹⁵³² is an apocalyptic number.

161532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233688).

161532 is an abundant number, since it is smaller than the sum of its proper divisors (305844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161532 is a wasteful number, since it uses less digits than its factorization.

161532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 653 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 161532 is about 401.9104377843. The cubic root of 161532 is about 54.4610725584.

Adding to 161532 its reverse (235161), we get a palindrome (396693).

The spelling of 161532 in words is "one hundred sixty-one thousand, five hundred thirty-two".