161326120 has 16 divisors (see below), whose sum is σ = 362983860. Its totient is φ = 64530432.

The previous prime is 161326097. The next prime is 161326157. The reversal of 161326120 is 21623161.

It can be written as a sum of positive squares in 2 ways, for example, as 146748996 + 14577124 = 12114^2 + 3818^2 .

It is a super-2 number, since 2×161326120² = 52052233988508800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161326091 and 161326100.

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, 2016537 + ... + 2016616.

Almost surely, 2^161326120 is an apocalyptic number.

161326120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161326120 is an abundant number, since it is smaller than the sum of its proper divisors (201657740).

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

161326120 is a wasteful number, since it uses less digits than its factorization.

161326120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033164 (or 4033160 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 161326120 is about 12701.4219676381. The cubic root of 161326120 is about 544.3792500337.

Adding to 161326120 its reverse (21623161), we get a palindrome (182949281).

The spelling of 161326120 in words is "one hundred sixty-one million, three hundred twenty-six thousand, one hundred twenty".