1242238605 has 8 divisors (see below), whose sum is σ = 1987581792. Its totient is φ = 662527248.

The previous prime is 1242238583. The next prime is 1242238609. The reversal of 1242238605 is 5068322421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1242238605 - 2⁵ = 1242238573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242238609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41407939 + ... + 41407968.

It is an arithmetic number, because the mean of its divisors is an integer number (248447724).

Almost surely, 2^1242238605 is an apocalyptic number.

1242238605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242238605 is a deficient number, since it is larger than the sum of its proper divisors (745343187).

1242238605 is an equidigital number, since it uses as much as digits as its factorization.

1242238605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82815915.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1242238605 is about 35245.4054452492. The cubic root of 1242238605 is about 1074.9831920934.

The spelling of 1242238605 in words is "one billion, two hundred forty-two million, two hundred thirty-eight thousand, six hundred five".