161704 has 32 divisors (see below), whose sum is σ = 340200. Its totient is φ = 71680.

The previous prime is 161683. The next prime is 161717. The reversal of 161704 is 407161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 122500 + 39204 = 350^2 + 198^2 .

It is a super-2 number, since 2×161704² = 52296367232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3924 + ... + 3964.

2¹⁶¹⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

161704 is an abundant number, since it is smaller than the sum of its proper divisors (178496).

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

161704 is a wasteful number, since it uses less digits than its factorization.

161704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 161704 is about 402.1243588742. The cubic root of 161704 is about 54.4803958332.

Adding to 161704 its reverse (407161), we get a palindrome (568865).

The spelling of 161704 in words is "one hundred sixty-one thousand, seven hundred four".