161541120 has 176 divisors, whose sum is σ = 557111520. Its totient is φ = 39714816.

The previous prime is 161541103. The next prime is 161541143. The reversal of 161541120 is 21145161.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199276 + ... + 200084.

Almost surely, 2^161541120 is an apocalyptic number.

161541120 is a gapful number since it is divisible by the number (10) 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 161541120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278555760).

161541120 is an abundant number, since it is smaller than the sum of its proper divisors (395570400).

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

161541120 is a wasteful number, since it uses less digits than its factorization.

161541120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 161541120 is about 12709.8827689322. The cubic root of 161541120 is about 544.6209748565.

Adding to 161541120 its reverse (21145161), we get a palindrome (182686281).

The spelling of 161541120 in words is "one hundred sixty-one million, five hundred forty-one thousand, one hundred twenty".