1242578342 has 8 divisors (see below), whose sum is σ = 1883082936. Its totient is φ = 614884032.

The previous prime is 1242578329. The next prime is 1242578371. The reversal of 1242578342 is 2438752421.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1242578296 and 1242578305.

It is a congruent 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, 3202328 + ... + 3202715.

It is an arithmetic number, because the mean of its divisors is an integer number (235385367).

Almost surely, 2^1242578342 is an apocalyptic number.

1242578342 is a deficient number, since it is larger than the sum of its proper divisors (640504594).

1242578342 is an equidigital number, since it uses as much as digits as its factorization.

1242578342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6405142.

The product of its digits is 107520, while the sum is 38.

The square root of 1242578342 is about 35250.2247085036. The cubic root of 1242578342 is about 1075.0811813940.

The spelling of 1242578342 in words is "one billion, two hundred forty-two million, five hundred seventy-eight thousand, three hundred forty-two".