1242858085 has 8 divisors (see below), whose sum is σ = 1704491136. Its totient is φ = 852245520.

The previous prime is 1242858059. The next prime is 1242858101. The reversal of 1242858085 is 5808582421.

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

It is a de Polignac number, because none of the positive numbers 2^k-1242858085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17755081 + ... + 17755150.

It is an arithmetic number, because the mean of its divisors is an integer number (213061392).

Almost surely, 2^1242858085 is an apocalyptic number.

It is an amenable number.

1242858085 is a deficient number, since it is larger than the sum of its proper divisors (461633051).

1242858085 is an equidigital number, since it uses as much as digits as its factorization.

1242858085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35510243.

The product of its (nonzero) digits is 204800, while the sum is 43.

The square root of 1242858085 is about 35254.1924457220. The cubic root of 1242858085 is about 1075.1618534017.

The spelling of 1242858085 in words is "one billion, two hundred forty-two million, eight hundred fifty-eight thousand, eighty-five".