1242908453 has 2 divisors, whose sum is σ = 1242908454. Its totient is φ = 1242908452.

The previous prime is 1242908363. The next prime is 1242908461. The reversal of 1242908453 is 3548092421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1153757089 + 89151364 = 33967^2 + 9442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242908453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242908053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621454226 + 621454227.

It is an arithmetic number, because the mean of its divisors is an integer number (621454227).

Almost surely, 2^1242908453 is an apocalyptic number.

It is an amenable number.

1242908453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242908453 is an equidigital number, since it uses as much as digits as its factorization.

1242908453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1242908453 is about 35254.9067932394. The cubic root of 1242908453 is about 1075.1763771893.

The spelling of 1242908453 in words is "one billion, two hundred forty-two million, nine hundred eight thousand, four hundred fifty-three".