1421243 has 2 divisors, whose sum is σ = 1421244. Its totient is φ = 1421242.

The previous prime is 1421227. The next prime is 1421249. The reversal of 1421243 is 3421241.

It is a strong prime.

It is an emirp because it is prime and its reverse (3421241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421243 - 2⁴ = 1421227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1421249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710621 + 710622.

It is an arithmetic number, because the mean of its divisors is an integer number (710622).

2^1421243 is an apocalyptic number.

1421243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421243 is an equidigital number, since it uses as much as digits as its factorization.

1421243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 17.

The square root of 1421243 is about 1192.1589659102. The cubic root of 1421243 is about 112.4318731559.

Adding to 1421243 its reverse (3421241), we get a palindrome (4842484).

It can be divided in two parts, 14212 and 43, that multiplied together give a palindrome (611116).

The spelling of 1421243 in words is "one million, four hundred twenty-one thousand, two hundred forty-three".