672641 has 2 divisors, whose sum is σ = 672642. Its totient is φ = 672640.

The previous prime is 672629. The next prime is 672643. The reversal of 672641 is 146276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461041 + 211600 = 679^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 672641 - 2⁶ = 672577 is a prime.

Together with 672643, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 672641.

It is not a weakly prime, because it can be changed into another prime (672643) 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, 336320 + 336321.

It is an arithmetic number, because the mean of its divisors is an integer number (336321).

2⁶⁷²⁶⁴¹ is an apocalyptic number.

It is an amenable number.

672641 is a deficient number, since it is larger than the sum of its proper divisors (1).

672641 is an equidigital number, since it uses as much as digits as its factorization.

672641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

The square root of 672641 is about 820.1469380544. The cubic root of 672641 is about 87.6182238657.

The spelling of 672641 in words is "six hundred seventy-two thousand, six hundred forty-one".