1242124040 has 64 divisors (see below), whose sum is σ = 3039217200. Its totient is φ = 454975488.

The previous prime is 1242124021. The next prime is 1242124067. The reversal of 1242124040 is 404212421.

It can be written as a sum of positive squares in 8 ways, for example, as 776513956 + 465610084 = 27866^2 + 21578^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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 15 ways as a sum of consecutive naturals, for example, 476 + ... + 49844.

Almost surely, 2^1242124040 is an apocalyptic number.

1242124040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242124040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1519608600).

1242124040 is an abundant number, since it is smaller than the sum of its proper divisors (1797093160).

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

1242124040 is a wasteful number, since it uses less digits than its factorization.

1242124040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49434 (or 49430 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1242124040 is about 35243.7801604765. The cubic root of 1242124040 is about 1074.9501444339.

Adding to 1242124040 its reverse (404212421), we get a palindrome (1646336461).

The spelling of 1242124040 in words is "one billion, two hundred forty-two million, one hundred twenty-four thousand, forty".