1649129 has 2 divisors, whose sum is σ = 1649130. Its totient is φ = 1649128.

The previous prime is 1649111. The next prime is 1649147. The reversal of 1649129 is 9219461.

It is a balanced prime because it is at equal distance from previous prime (1649111) and next prime (1649147).

It can be written as a sum of positive squares in only one way, i.e., 1525225 + 123904 = 1235^2 + 352^2 .

It is an emirp because it is prime and its reverse (9219461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649129 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1649095 and 1649104.

It is not a weakly prime, because it can be changed into another prime (1649149) 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, 824564 + 824565.

It is an arithmetic number, because the mean of its divisors is an integer number (824565).

2^1649129 is an apocalyptic number.

It is an amenable number.

1649129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649129 is an equidigital number, since it uses as much as digits as its factorization.

1649129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 1649129 is about 1284.1841768220. The cubic root of 1649129 is about 118.1457788442.

The spelling of 1649129 in words is "one million, six hundred forty-nine thousand, one hundred twenty-nine".