161003072 has 14 divisors (see below), whose sum is σ = 319490598. Its totient is φ = 80501504.

The previous prime is 161003071. The next prime is 161003081. The reversal of 161003072 is 270300161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 90174016 + 70829056 = 9496^2 + 8416^2 .

It is not an unprimeable number, because it can be changed into a prime (161003071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257773 + ... + 1257900.

It is an arithmetic number, because the mean of its divisors is an integer number (22820757).

Almost surely, 2^161003072 is an apocalyptic number.

It is an amenable number.

161003072 is a deficient number, since it is larger than the sum of its proper divisors (158487526).

161003072 is an equidigital number, since it uses as much as digits as its factorization.

161003072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515685 (or 2515675 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 161003072 is about 12688.6985936305. The cubic root of 161003072 is about 544.0156425721.

The spelling of 161003072 in words is "one hundred sixty-one million, three thousand, seventy-two".