1242906829 has 2 divisors, whose sum is σ = 1242906830. Its totient is φ = 1242906828.

The previous prime is 1242906827. The next prime is 1242906859. The reversal of 1242906829 is 9286092421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1208952900 + 33953929 = 34770^2 + 5827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242906829 - 2¹ = 1242906827 is a prime.

Together with 1242906827, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242906827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621453414 + 621453415.

It is an arithmetic number, because the mean of its divisors is an integer number (621453415).

Almost surely, 2^1242906829 is an apocalyptic number.

It is an amenable number.

1242906829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242906829 is an equidigital number, since it uses as much as digits as its factorization.

1242906829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1242906829 is about 35254.8837609770. The cubic root of 1242906829 is about 1075.1759089094.

The spelling of 1242906829 in words is "one billion, two hundred forty-two million, nine hundred six thousand, eight hundred twenty-nine".