161672 has 16 divisors (see below), whose sum is σ = 346560. Its totient is φ = 69264.

The previous prime is 161659. The next prime is 161683. The reversal of 161672 is 276161.

161672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161672² = 52275671168, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 16.

It is an unprimeable number.

161672 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388 + ... + 1499.

It is an arithmetic number, because the mean of its divisors is an integer number (21660).

2¹⁶¹⁶⁷² is an apocalyptic number.

It is an amenable number.

161672 is an abundant number, since it is smaller than the sum of its proper divisors (184888).

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

161672 is a wasteful number, since it uses less digits than its factorization.

161672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900 (or 2896 counting only the distinct ones).

The product of its digits is 504, while the sum is 23.

The square root of 161672 is about 402.0845682192. The cubic root of 161672 is about 54.4768018432.

The spelling of 161672 in words is "one hundred sixty-one thousand, six hundred seventy-two".