672161 has 8 divisors (see below), whose sum is σ = 775104. Its totient is φ = 570960.

The previous prime is 672151. The next prime is 672167. The reversal of 672161 is 161276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 672161 - 2⁶ = 672097 is a prime.

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

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 672161.

It is not an unprimeable number, because it can be changed into a prime (672167) 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 in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (96888).

2⁶⁷²¹⁶¹ is an apocalyptic number.

It is an amenable number.

672161 is a deficient number, since it is larger than the sum of its proper divisors (102943).

672161 is a wasteful number, since it uses less digits than its factorization.

672161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871.

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

The square root of 672161 is about 819.8542553405. The cubic root of 672161 is about 87.5973773045.

The spelling of 672161 in words is "six hundred seventy-two thousand, one hundred sixty-one".