161754072 has 64 divisors (see below), whose sum is σ = 415687680. Its totient is φ = 52426752.

The previous prime is 161754059. The next prime is 161754079. The reversal of 161754072 is 270457161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161754079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217333 + ... + 218075.

It is an arithmetic number, because the mean of its divisors is an integer number (6495120).

Almost surely, 2^161754072 is an apocalyptic number.

161754072 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 161754072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207843840).

161754072 is an abundant number, since it is smaller than the sum of its proper divisors (253933608).

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

161754072 is a wasteful number, since it uses less digits than its factorization.

161754072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992 (or 988 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 161754072 is about 12718.2574278083. The cubic root of 161754072 is about 544.8601857775.

The spelling of 161754072 in words is "one hundred sixty-one million, seven hundred fifty-four thousand, seventy-two".