161542017 has 24 divisors (see below), whose sum is σ = 287187264. Its totient is φ = 85208544.

The previous prime is 161542001. The next prime is 161542027. The reversal of 161542017 is 710245161.

It is a happy number.

161542017 is a `hidden beast` number, since 1 + 615 + 42 + 0 + 1 + 7 = 666.

It is not a de Polignac number, because 161542017 - 2⁴ = 161542001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161542027) 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 23 ways as a sum of consecutive naturals, for example, 97803 + ... + 99440.

It is an arithmetic number, because the mean of its divisors is an integer number (11966136).

Almost surely, 2^161542017 is an apocalyptic number.

It is an amenable number.

161542017 is a deficient number, since it is larger than the sum of its proper divisors (125645247).

161542017 is a wasteful number, since it uses less digits than its factorization.

161542017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197269 (or 197266 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 161542017 is about 12709.9180563842. The cubic root of 161542017 is about 544.6219829055.

Adding to 161542017 its reverse (710245161), we get a palindrome (871787178).

The spelling of 161542017 in words is "one hundred sixty-one million, five hundred forty-two thousand, seventeen".