161434138 has 16 divisors (see below), whose sum is σ = 248812200. Its totient is φ = 78508800.

The previous prime is 161434129. The next prime is 161434157. The reversal of 161434138 is 831434161.

161434138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 154181889 + 7252249 = 12417^2 + 2693^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25798 + ... + 31438.

Almost surely, 2^161434138 is an apocalyptic number.

161434138 is a deficient number, since it is larger than the sum of its proper divisors (87378062).

161434138 is a wasteful number, since it uses less digits than its factorization.

161434138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6033.

The product of its digits is 6912, while the sum is 31.

The square root of 161434138 is about 12705.6734571608. The cubic root of 161434138 is about 544.5007216604.

Adding to 161434138 its reverse (831434161), we get a palindrome (992868299).

The spelling of 161434138 in words is "one hundred sixty-one million, four hundred thirty-four thousand, one hundred thirty-eight".