161103128 has 16 divisors (see below), whose sum is σ = 317967000. Its totient is φ = 76311936.

The previous prime is 161103113. The next prime is 161103133. The reversal of 161103128 is 821301161.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 529793 + ... + 530096.

Almost surely, 2^161103128 is an apocalyptic number.

It is an amenable number.

161103128 is a deficient number, since it is larger than the sum of its proper divisors (156863872).

161103128 is a wasteful number, since it uses less digits than its factorization.

161103128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059914 (or 1059910 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 161103128 is about 12692.6407023913. The cubic root of 161103128 is about 544.1283127978.

Adding to 161103128 its reverse (821301161), we get a palindrome (982404289).

The spelling of 161103128 in words is "one hundred sixty-one million, one hundred three thousand, one hundred twenty-eight".