672081 has 4 divisors (see below), whose sum is σ = 896112. Its totient is φ = 448052.

The previous prime is 672079. The next prime is 672097. The reversal of 672081 is 180276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 672081 - 2¹ = 672079 is a prime.

It is a super-2 number, since 2×672081² = 903385741122, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (672041) 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 3 ways as a sum of consecutive naturals, for example, 112011 + ... + 112016.

It is an arithmetic number, because the mean of its divisors is an integer number (224028).

2⁶⁷²⁰⁸¹ is an apocalyptic number.

It is an amenable number.

672081 is a deficient number, since it is larger than the sum of its proper divisors (224031).

672081 is a wasteful number, since it uses less digits than its factorization.

672081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224030.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 672081 is about 819.8054647293. The cubic root of 672081 is about 87.5939019128.

The spelling of 672081 in words is "six hundred seventy-two thousand, eighty-one".