1242034289 has 2 divisors, whose sum is σ = 1242034290. Its totient is φ = 1242034288.

The previous prime is 1242034273. The next prime is 1242034309. The reversal of 1242034289 is 9824302421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649842064 + 592192225 = 25492^2 + 24335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242034289 - 2⁴ = 1242034273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242034589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621017144 + 621017145.

It is an arithmetic number, because the mean of its divisors is an integer number (621017145).

Almost surely, 2^1242034289 is an apocalyptic number.

It is an amenable number.

1242034289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242034289 is an equidigital number, since it uses as much as digits as its factorization.

1242034289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 1242034289 is about 35242.5068489743. The cubic root of 1242034289 is about 1074.9242532531.

The spelling of 1242034289 in words is "one billion, two hundred forty-two million, thirty-four thousand, two hundred eighty-nine".