161288 has 8 divisors (see below), whose sum is σ = 302430. Its totient is φ = 80640.

The previous prime is 161281. The next prime is 161303. The reversal of 161288 is 882161.

It can be written as a sum of positive squares in only one way, i.e., 128164 + 33124 = 358^2 + 182^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (161281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10073 + ... + 10088.

2¹⁶¹²⁸⁸ is an apocalyptic number.

It is an amenable number.

161288 is a deficient number, since it is larger than the sum of its proper divisors (141142).

161288 is a wasteful number, since it uses less digits than its factorization.

161288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20167 (or 20163 counting only the distinct ones).

The product of its digits is 768, while the sum is 26.

The square root of 161288 is about 401.6067728513. The cubic root of 161288 is about 54.4336369249.

The spelling of 161288 in words is "one hundred sixty-one thousand, two hundred eighty-eight".