1672861 has 2 divisors, whose sum is σ = 1672862. Its totient is φ = 1672860.

The previous prime is 1672849. The next prime is 1672873. The reversal of 1672861 is 1682761.

It is a balanced prime because it is at equal distance from previous prime (1672849) and next prime (1672873).

It can be written as a sum of positive squares in only one way, i.e., 1610361 + 62500 = 1269^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1672861 - 2¹¹ = 1670813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1672961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836430 + 836431.

It is an arithmetic number, because the mean of its divisors is an integer number (836431).

2^1672861 is an apocalyptic number.

It is an amenable number.

1672861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672861 is an equidigital number, since it uses as much as digits as its factorization.

1672861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 1672861 is about 1293.3912787707. The cubic root of 1672861 is about 118.7098124400.

The spelling of 1672861 in words is "one million, six hundred seventy-two thousand, eight hundred sixty-one".