42721730242 has 8 divisors (see below), whose sum is σ = 67455363600. Its totient is φ = 20236609044.

The previous prime is 42721730237. The next prime is 42721730297. The reversal of 42721730242 is 24203712724.

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

It is a junction number, because it is equal to n+sod(n) for n = 42721730198 and 42721730207.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562127992 + ... + 562128067.

It is an arithmetic number, because the mean of its divisors is an integer number (8431920450).

Almost surely, 2^42721730242 is an apocalyptic number.

42721730242 is a deficient number, since it is larger than the sum of its proper divisors (24733633358).

42721730242 is a wasteful number, since it uses less digits than its factorization.

42721730242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124256080.

The product of its (nonzero) digits is 37632, while the sum is 34.

The spelling of 42721730242 in words is "forty-two billion, seven hundred twenty-one million, seven hundred thirty thousand, two hundred forty-two".