161247072 has 192 divisors, whose sum is σ = 519160320. Its totient is φ = 42799104.

The previous prime is 161247071. The next prime is 161247101. The reversal of 161247072 is 270742161.

161247072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161247071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 931978 + ... + 932150.

It is an arithmetic number, because the mean of its divisors is an integer number (2703960).

Almost surely, 2^161247072 is an apocalyptic number.

161247072 is a gapful number since it is divisible by the number (12) 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 161247072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259580160).

161247072 is an abundant number, since it is smaller than the sum of its proper divisors (357913248).

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

161247072 is a wasteful number, since it uses less digits than its factorization.

161247072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 161247072 is about 12698.3098087895. The cubic root of 161247072 is about 544.2903222534.

It can be divided in two parts, 1612 and 47072, that added together give a palindrome (48684).

The spelling of 161247072 in words is "one hundred sixty-one million, two hundred forty-seven thousand, seventy-two".