1242204516 has 144 divisors (see below), whose sum is σ = 3781499904. Its totient is φ = 336143808.

The previous prime is 1242204499. The next prime is 1242204517. The reversal of 1242204516 is 6154022421.

1242204516 is a `hidden beast` number, since 124 + 2 + 20 + 4 + 516 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1242204516.

It is not an unprimeable number, because it can be changed into a prime (1242204517) 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 47 ways as a sum of consecutive naturals, for example, 619171 + ... + 621173.

It is an arithmetic number, because the mean of its divisors is an integer number (26260416).

Almost surely, 2^1242204516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242204516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1890749952).

1242204516 is an abundant number, since it is smaller than the sum of its proper divisors (2539295388).

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

1242204516 is a wasteful number, since it uses less digits than its factorization.

1242204516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150 (or 2145 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1242204516 is about 35244.9218469839. The cubic root of 1242204516 is about 1074.9733589215.

Adding to 1242204516 its reverse (6154022421), we get a palindrome (7396226937).

The spelling of 1242204516 in words is "one billion, two hundred forty-two million, two hundred four thousand, five hundred sixteen".