161140134 has 8 divisors (see below), whose sum is σ = 322280280. Its totient is φ = 53713376.

The previous prime is 161140117. The next prime is 161140163. The reversal of 161140134 is 431041161.

It is a sphenic number, since it is the product of 3 distinct primes.

161140134 is an admirable number.

It is a super-2 number, since 2×161140134² = 51932285571075912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161140134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13428339 + ... + 13428350.

It is an arithmetic number, because the mean of its divisors is an integer number (40285035).

Almost surely, 2^161140134 is an apocalyptic number.

161140134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161140134 is a wasteful number, since it uses less digits than its factorization.

161140134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26856694.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 161140134 is about 12694.0983925602. The cubic root of 161140134 is about 544.1699723877.

Adding to 161140134 its reverse (431041161), we get a palindrome (592181295).

The spelling of 161140134 in words is "one hundred sixty-one million, one hundred forty thousand, one hundred thirty-four".