1242121442 has 8 divisors (see below), whose sum is σ = 1890991056. Its totient is φ = 611791092.

The previous prime is 1242121429. The next prime is 1242121459. The reversal of 1242121442 is 2441212421.

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

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 3 ways as a sum of consecutive naturals, for example, 4634648 + ... + 4634915.

It is an arithmetic number, because the mean of its divisors is an integer number (236373882).

Almost surely, 2^1242121442 is an apocalyptic number.

1242121442 is a deficient number, since it is larger than the sum of its proper divisors (648869614).

1242121442 is an equidigital number, since it uses as much as digits as its factorization.

1242121442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9269632.

The product of its digits is 1024, while the sum is 23.

The square root of 1242121442 is about 35243.7433028899. The cubic root of 1242121442 is about 1074.9493949858.

Adding to 1242121442 its reverse (2441212421), we get a palindrome (3683333863).

The spelling of 1242121442 in words is "one billion, two hundred forty-two million, one hundred twenty-one thousand, four hundred forty-two".