1242040044 has 48 divisors (see below), whose sum is σ = 3379712000. Its totient is φ = 354867408.

The previous prime is 1242040021. The next prime is 1242040049. The reversal of 1242040044 is 4400402421.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1242040044.

It is not an unprimeable number, because it can be changed into a prime (1242040049) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 146764 + ... + 154995.

Almost surely, 2^1242040044 is an apocalyptic number.

1242040044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1242040044 is an abundant number, since it is smaller than the sum of its proper divisors (2137671956).

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

1242040044 is a wasteful number, since it uses less digits than its factorization.

1242040044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301787 (or 301771 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 1242040044 is about 35242.5884974416. The cubic root of 1242040044 is about 1074.9259134809.

Adding to 1242040044 its reverse (4400402421), we get a palindrome (5642442465).

The spelling of 1242040044 in words is "one billion, two hundred forty-two million, forty thousand, forty-four".