161001572 has 12 divisors (see below), whose sum is σ = 281847216. Its totient is φ = 80473800.

The previous prime is 161001571. The next prime is 161001593. The reversal of 161001572 is 275100161.

It is not an unprimeable number, because it can be changed into a prime (161001571) 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 in 3 ways as a sum of consecutive naturals, for example, 13283 + ... + 22325.

It is an arithmetic number, because the mean of its divisors is an integer number (23487268).

Almost surely, 2^161001572 is an apocalyptic number.

It is an amenable number.

161001572 is a deficient number, since it is larger than the sum of its proper divisors (120845644).

161001572 is a wasteful number, since it uses less digits than its factorization.

161001572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13498 (or 13496 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 161001572 is about 12688.6394857762. The cubic root of 161001572 is about 544.0139531095.

The spelling of 161001572 in words is "one hundred sixty-one million, one thousand, five hundred seventy-two".