1242503 has 2 divisors, whose sum is σ = 1242504. Its totient is φ = 1242502.

The previous prime is 1242487. The next prime is 1242517. The reversal of 1242503 is 3052421.

It is a strong prime.

It is an emirp because it is prime and its reverse (3052421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242503 - 2⁴ = 1242487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621251 + 621252.

It is an arithmetic number, because the mean of its divisors is an integer number (621252).

2^1242503 is an apocalyptic number.

1242503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242503 is an equidigital number, since it uses as much as digits as its factorization.

1242503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1242503 is about 1114.6761861635. The cubic root of 1242503 is about 107.5059452274.

Adding to 1242503 its reverse (3052421), we get a palindrome (4294924).

The spelling of 1242503 in words is "one million, two hundred forty-two thousand, five hundred three".