1242105606 has 72 divisors (see below), whose sum is σ = 3136830840. Its totient is φ = 354182976.

The previous prime is 1242105589. The next prime is 1242105647. The reversal of 1242105606 is 6065012421.

1242105606 is a `hidden beast` number, since 1 + 2 + 42 + 10 + 5 + 606 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1242105606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 580170 + ... + 582306.

It is an arithmetic number, because the mean of its divisors is an integer number (43567095).

Almost surely, 2^1242105606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242105606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1568415420).

1242105606 is an abundant number, since it is smaller than the sum of its proper divisors (1894725234).

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

1242105606 is a wasteful number, since it uses less digits than its factorization.

1242105606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818 (or 2808 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1242105606 is about 35243.5186381837. The cubic root of 1242105606 is about 1074.9448267339.

The spelling of 1242105606 in words is "one billion, two hundred forty-two million, one hundred five thousand, six hundred six".