1242553003 has 2 divisors, whose sum is σ = 1242553004. Its totient is φ = 1242553002.

The previous prime is 1242552991. The next prime is 1242553009. The reversal of 1242553003 is 3003552421.

It is a strong prime.

It is an emirp because it is prime and its reverse (3003552421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242553003 - 2²⁹ = 705682091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242553009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621276501 + 621276502.

It is an arithmetic number, because the mean of its divisors is an integer number (621276502).

Almost surely, 2^1242553003 is an apocalyptic number.

1242553003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242553003 is an equidigital number, since it uses as much as digits as its factorization.

1242553003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 1242553003 is about 35249.8652905227. The cubic root of 1242553003 is about 1075.0738735604.

The spelling of 1242553003 in words is "one billion, two hundred forty-two million, five hundred fifty-three thousand, three".