1204420123 has 2 divisors, whose sum is σ = 1204420124. Its totient is φ = 1204420122.

The previous prime is 1204420079. The next prime is 1204420163. The reversal of 1204420123 is 3210244021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1204420123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1204420123.

It is not a weakly prime, because it can be changed into another prime (1204420163) 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, 602210061 + 602210062.

It is an arithmetic number, because the mean of its divisors is an integer number (602210062).

Almost surely, 2^1204420123 is an apocalyptic number.

1204420123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204420123 is an equidigital number, since it uses as much as digits as its factorization.

1204420123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1204420123 is about 34704.7564895649. The cubic root of 1204420123 is about 1063.9617153556.

Adding to 1204420123 its reverse (3210244021), we get a palindrome (4414664144).

The spelling of 1204420123 in words is "one billion, two hundred four million, four hundred twenty thousand, one hundred twenty-three".