1242144420 has 48 divisors (see below), whose sum is σ = 3794188608. Its totient is φ = 301125760.

The previous prime is 1242144419. The next prime is 1242144433. The reversal of 1242144420 is 244412421.

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 15 ways as a sum of consecutive naturals, for example, 940359 + ... + 941678.

It is an arithmetic number, because the mean of its divisors is an integer number (79045596).

Almost surely, 2^1242144420 is an apocalyptic number.

1242144420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242144420 is an abundant number, since it is smaller than the sum of its proper divisors (2552044188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242144420 is a wasteful number, since it uses less digits than its factorization.

1242144420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882060 (or 1882058 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 1242144420 is about 35244.0692883214. The cubic root of 1242144420 is about 1074.9560234399.

Adding to 1242144420 its reverse (244412421), we get a palindrome (1486556841).

The spelling of 1242144420 in words is "one billion, two hundred forty-two million, one hundred forty-four thousand, four hundred twenty".