1242403 has 2 divisors, whose sum is σ = 1242404. Its totient is φ = 1242402.

The previous prime is 1242379. The next prime is 1242407. The reversal of 1242403 is 3042421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242403 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (1242407) 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, 621201 + 621202.

It is an arithmetic number, because the mean of its divisors is an integer number (621202).

2^1242403 is an apocalyptic number.

1242403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242403 is an equidigital number, since it uses as much as digits as its factorization.

1242403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1242403 is about 1114.6313291847. The cubic root of 1242403 is about 107.5030610270.

Adding to 1242403 its reverse (3042421), we get a palindrome (4284824).

The spelling of 1242403 in words is "one million, two hundred forty-two thousand, four hundred three".