1242402216 has 64 divisors (see below), whose sum is σ = 3395520000. Its totient is φ = 375691200.

The previous prime is 1242402199. The next prime is 1242402223. The reversal of 1242402216 is 6122042421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 127021 + ... + 136451.

It is an arithmetic number, because the mean of its divisors is an integer number (53055000).

Almost surely, 2^1242402216 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 1242402216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1697760000).

1242402216 is an abundant number, since it is smaller than the sum of its proper divisors (2153117784).

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

1242402216 is a wasteful number, since it uses less digits than its factorization.

1242402216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9950 (or 9946 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1242402216 is about 35247.7263947620. The cubic root of 1242402216 is about 1075.0303841421.

Adding to 1242402216 its reverse (6122042421), we get a palindrome (7364444637).

The spelling of 1242402216 in words is "one billion, two hundred forty-two million, four hundred two thousand, two hundred sixteen".