161039424 has 168 divisors, whose sum is σ = 528035520. Its totient is φ = 42412032.

The previous prime is 161039381. The next prime is 161039449. The reversal of 161039424 is 424930161.

It is a tau number, because it is divible by the number of its divisors (168).

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 161039391 and 161039400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226782 + ... + 227490.

Almost surely, 2^161039424 is an apocalyptic number.

161039424 is a gapful number since it is divisible by the number (14) 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 161039424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264017760).

161039424 is an abundant number, since it is smaller than the sum of its proper divisors (366996096).

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

161039424 is a wasteful number, since it uses less digits than its factorization.

161039424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 161039424 is about 12690.1309685913. The cubic root of 161039424 is about 544.0565829264.

Adding to 161039424 its reverse (424930161), we get a palindrome (585969585).

The spelling of 161039424 in words is "one hundred sixty-one million, thirty-nine thousand, four hundred twenty-four".