1242423229 has 2 divisors, whose sum is σ = 1242423230. Its totient is φ = 1242423228.

The previous prime is 1242423211. The next prime is 1242423289. The reversal of 1242423229 is 9223242421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 763251129 + 479172100 = 27627^2 + 21890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242423229 - 2¹⁹ = 1241898941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242423229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242423289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621211614 + 621211615.

It is an arithmetic number, because the mean of its divisors is an integer number (621211615).

Almost surely, 2^1242423229 is an apocalyptic number.

It is an amenable number.

1242423229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242423229 is an equidigital number, since it uses as much as digits as its factorization.

1242423229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 1242423229 is about 35248.0244694650. The cubic root of 1242423229 is about 1075.0364448434.

It can be divided in two parts, 12424 and 23229, that added together give a palindrome (35653).

The spelling of 1242423229 in words is "one billion, two hundred forty-two million, four hundred twenty-three thousand, two hundred twenty-nine".