161004132 has 48 divisors (see below), whose sum is σ = 424278400. Its totient is φ = 52786080.

The previous prime is 161004113. The next prime is 161004139. The reversal of 161004132 is 231400161.

It is a happy number.

161004132 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (161004139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5632 + ... + 18807.

Almost surely, 2^161004132 is an apocalyptic number.

161004132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161004132 is an abundant number, since it is smaller than the sum of its proper divisors (263274268).

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

161004132 is a wasteful number, since it uses less digits than its factorization.

161004132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24513 (or 24505 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 161004132 is about 12688.7403630148. The cubic root of 161004132 is about 544.0168364527.

Adding to 161004132 its reverse (231400161), we get a palindrome (392404293).

The spelling of 161004132 in words is "one hundred sixty-one million, four thousand, one hundred thirty-two".