1242013403 has 2 divisors, whose sum is σ = 1242013404. Its totient is φ = 1242013402.

The previous prime is 1242013393. The next prime is 1242013417. The reversal of 1242013403 is 3043102421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242013403 - 2¹⁰ = 1242012379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242013433) 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, 621006701 + 621006702.

It is an arithmetic number, because the mean of its divisors is an integer number (621006702).

Almost surely, 2^1242013403 is an apocalyptic number.

1242013403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242013403 is an equidigital number, since it uses as much as digits as its factorization.

1242013403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1242013403 is about 35242.2105294205. The cubic root of 1242013403 is about 1074.9182279246.

Adding to 1242013403 its reverse (3043102421), we get a palindrome (4285115824).

The spelling of 1242013403 in words is "one billion, two hundred forty-two million, thirteen thousand, four hundred three".