1242142427 has 2 divisors, whose sum is σ = 1242142428. Its totient is φ = 1242142426.

The previous prime is 1242142409. The next prime is 1242142453. The reversal of 1242142427 is 7242412421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242142427 - 2⁸ = 1242142171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242142427.

It is not a weakly prime, because it can be changed into another prime (1242142127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621071213 + 621071214.

It is an arithmetic number, because the mean of its divisors is an integer number (621071214).

Almost surely, 2^1242142427 is an apocalyptic number.

1242142427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242142427 is an equidigital number, since it uses as much as digits as its factorization.

1242142427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 29.

The square root of 1242142427 is about 35244.0410140495. The cubic root of 1242142427 is about 1074.9554485232.

Adding to 1242142427 its reverse (7242412421), we get a palindrome (8484554848).

The spelling of 1242142427 in words is "one billion, two hundred forty-two million, one hundred forty-two thousand, four hundred twenty-seven".