1239960042 has 64 divisors (see below), whose sum is σ = 2957679360. Its totient is φ = 383657472.

The previous prime is 1239960037. The next prime is 1239960053. The reversal of 1239960042 is 2400699321.

1239960042 is a `hidden beast` number, since 1 + 2 + 3 + 9 + 9 + 600 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1239959979 and 1239960006.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57763 + ... + 76265.

It is an arithmetic number, because the mean of its divisors is an integer number (46213740).

Almost surely, 2^1239960042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1239960042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478839680).

1239960042 is an abundant number, since it is smaller than the sum of its proper divisors (1717719318).

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

1239960042 is a wasteful number, since it uses less digits than its factorization.

1239960042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18604 (or 18598 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1239960042 is about 35213.0663532729. The cubic root of 1239960042 is about 1074.3255309831.

The spelling of 1239960042 in words is "one billion, two hundred thirty-nine million, nine hundred sixty thousand, forty-two".