1242643346 has 8 divisors (see below), whose sum is σ = 2130245760. Its totient is φ = 532561428.

The previous prime is 1242643327. The next prime is 1242643351. The reversal of 1242643346 is 6433462421.

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

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 44380106 + ... + 44380133.

It is an arithmetic number, because the mean of its divisors is an integer number (266280720).

Almost surely, 2^1242643346 is an apocalyptic number.

1242643346 is a deficient number, since it is larger than the sum of its proper divisors (887602414).

1242643346 is an equidigital number, since it uses as much as digits as its factorization.

1242643346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88760248.

The product of its digits is 82944, while the sum is 35.

The square root of 1242643346 is about 35251.1467331206. The cubic root of 1242643346 is about 1075.0999282626.

The spelling of 1242643346 in words is "one billion, two hundred forty-two million, six hundred forty-three thousand, three hundred forty-six".