1672129 has 2 divisors, whose sum is σ = 1672130. Its totient is φ = 1672128.

The previous prime is 1672117. The next prime is 1672199. The reversal of 1672129 is 9212761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1495729 + 176400 = 1223^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 1672129 - 2¹⁹ = 1147841 is a prime.

It is a Chen prime.

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

1672129 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1672097 and 1672106.

It is not a weakly prime, because it can be changed into another prime (1672199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836064 + 836065.

It is an arithmetic number, because the mean of its divisors is an integer number (836065).

2^1672129 is an apocalyptic number.

It is an amenable number.

1672129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672129 is an equidigital number, since it uses as much as digits as its factorization.

1672129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 1672129 is about 1293.1082707956. The cubic root of 1672129 is about 118.6924951494.

The spelling of 1672129 in words is "one million, six hundred seventy-two thousand, one hundred twenty-nine".