1645363 has 2 divisors, whose sum is σ = 1645364. Its totient is φ = 1645362.

The previous prime is 1645349. The next prime is 1645367. The reversal of 1645363 is 3635461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1645363 - 2¹⁷ = 1514291 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1645367) 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, 822681 + 822682.

It is an arithmetic number, because the mean of its divisors is an integer number (822682).

2^1645363 is an apocalyptic number.

1645363 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645363 is an equidigital number, since it uses as much as digits as its factorization.

1645363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

The square root of 1645363 is about 1282.7170381655. The cubic root of 1645363 is about 118.0557765614.

The spelling of 1645363 in words is "one million, six hundred forty-five thousand, three hundred sixty-three".