161187132 has 48 divisors (see below), whose sum is σ = 404786592. Its totient is φ = 49735680.

The previous prime is 161187121. The next prime is 161187137. The reversal of 161187132 is 231781161.

161187132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161187132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161187137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5968 + ... + 18920.

It is an arithmetic number, because the mean of its divisors is an integer number (8433054).

Almost surely, 2^161187132 is an apocalyptic number.

161187132 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 161187132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202393296).

161187132 is an abundant number, since it is smaller than the sum of its proper divisors (243599460).

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

161187132 is a wasteful number, since it uses less digits than its factorization.

161187132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13038 (or 13036 counting only the distinct ones).

The product of its digits is 2016, while the sum is 30.

The square root of 161187132 is about 12695.9494327915. The cubic root of 161187132 is about 544.2228713020. Note that the first 3 decimals are identical.

The spelling of 161187132 in words is "one hundred sixty-one million, one hundred eighty-seven thousand, one hundred thirty-two".