1550243 has 2 divisors, whose sum is σ = 1550244. Its totient is φ = 1550242.

The previous prime is 1550233. The next prime is 1550257. The reversal of 1550243 is 3420551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1550243 - 2⁸ = 1549987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1550203) 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, 775121 + 775122.

It is an arithmetic number, because the mean of its divisors is an integer number (775122).

2^1550243 is an apocalyptic number.

1550243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550243 is an equidigital number, since it uses as much as digits as its factorization.

1550243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1550243 is about 1245.0875471227. The cubic root of 1550243 is about 115.7355002075.

Adding to 1550243 its reverse (3420551), we get a palindrome (4970794).

The spelling of 1550243 in words is "one million, five hundred fifty thousand, two hundred forty-three".