720000042 has 8 divisors (see below), whose sum is σ = 1440000096. Its totient is φ = 240000012.

The previous prime is 719999999. The next prime is 720000049. The reversal of 720000042 is 240000027.

It is a sphenic number, since it is the product of 3 distinct primes.

720000042 is an admirable number.

It is a Smith number, since the sum of its digits (15) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 719999976 and 720000030.

It is not an unprimeable number, because it can be changed into a prime (720000049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59999998 + ... + 60000009.

It is an arithmetic number, because the mean of its divisors is an integer number (180000012).

Almost surely, 2^720000042 is an apocalyptic number.

720000042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

720000042 is a wasteful number, since it uses less digits than its factorization.

720000042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120000012.

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 720000042 is about 26832.8165126213. The cubic root of 720000042 is about 896.2809667391.

Subtracting from 720000042 its sum of digits (15), we obtain a palindrome (720000027).

Adding to 720000042 its reverse (240000027), we get a palindrome (960000069).

The spelling of 720000042 in words is "seven hundred twenty million, forty-two", and thus it is an aban number.