1804129 has 2 divisors, whose sum is σ = 1804130. Its totient is φ = 1804128.

The previous prime is 1804093. The next prime is 1804133. The reversal of 1804129 is 9214081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1782225 + 21904 = 1335^2 + 148^2 .

It is a cyclic number.

It is not a de Polignac number, because 1804129 - 2¹¹ = 1802081 is a prime.

It is equal to p₁₃₅₃₄₉ and since 1804129 and 135349 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1804139) 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, 902064 + 902065.

It is an arithmetic number, because the mean of its divisors is an integer number (902065).

2^1804129 is an apocalyptic number.

It is an amenable number.

1804129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1804129 is an equidigital number, since it uses as much as digits as its factorization.

1804129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1804129 is about 1343.1786925052. The cubic root of 1804129 is about 121.7369815189.

The spelling of 1804129 in words is "one million, eight hundred four thousand, one hundred twenty-nine".