1242330421 has 2 divisors, whose sum is σ = 1242330422. Its totient is φ = 1242330420.

The previous prime is 1242330413. The next prime is 1242330451. The reversal of 1242330421 is 1240332421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1232782321 + 9548100 = 35111^2 + 3090^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242330421 - 2³ = 1242330413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242330392 and 1242330401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242330451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621165210 + 621165211.

It is an arithmetic number, because the mean of its divisors is an integer number (621165211).

Almost surely, 2^1242330421 is an apocalyptic number.

It is an amenable number.

1242330421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242330421 is an equidigital number, since it uses as much as digits as its factorization.

1242330421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1242330421 is about 35246.7079455656. The cubic root of 1242330421 is about 1075.0096760622.

Adding to 1242330421 its reverse (1240332421), we get a palindrome (2482662842).

The spelling of 1242330421 in words is "one billion, two hundred forty-two million, three hundred thirty thousand, four hundred twenty-one".