1242054442 has 16 divisors (see below), whose sum is σ = 2002121280. Its totient is φ = 575771328.

The previous prime is 1242054433. The next prime is 1242054461. The reversal of 1242054442 is 2444502421.

It is a self number, because there is not a number n which added to its sum of digits gives 1242054442.

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 7 ways as a sum of consecutive naturals, for example, 270342 + ... + 274897.

It is an arithmetic number, because the mean of its divisors is an integer number (125132580).

Almost surely, 2^1242054442 is an apocalyptic number.

1242054442 is a deficient number, since it is larger than the sum of its proper divisors (760066838).

1242054442 is a wasteful number, since it uses less digits than its factorization.

1242054442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545325.

The product of its (nonzero) digits is 10240, while the sum is 28.

The square root of 1242054442 is about 35242.7927667488. The cubic root of 1242054442 is about 1074.9300670570.

Adding to 1242054442 its reverse (2444502421), we get a palindrome (3686556863).

The spelling of 1242054442 in words is "one billion, two hundred forty-two million, fifty-four thousand, four hundred forty-two".