1605349 has 2 divisors, whose sum is σ = 1605350. Its totient is φ = 1605348.

The previous prime is 1605341. The next prime is 1605389. The reversal of 1605349 is 9435061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1562500 + 42849 = 1250^2 + 207^2 .

It is a cyclic number.

It is not a de Polignac number, because 1605349 - 2³ = 1605341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1605341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802674 + 802675.

It is an arithmetic number, because the mean of its divisors is an integer number (802675).

2^1605349 is an apocalyptic number.

It is an amenable number.

1605349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605349 is an equidigital number, since it uses as much as digits as its factorization.

1605349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1605349 is about 1267.0236777582. The cubic root of 1605349 is about 117.0909026428.

The spelling of 1605349 in words is "one million, six hundred five thousand, three hundred forty-nine".