42720260420 has 12 divisors (see below), whose sum is σ = 89712546924. Its totient is φ = 17088104160.

The previous prime is 42720260371. The next prime is 42720260423. The reversal of 42720260420 is 2406202724.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28796732416 + 13923528004 = 169696^2 + 117998^2 .

It is not an unprimeable number, because it can be changed into a prime (42720260423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068006491 + ... + 1068006530.

It is an arithmetic number, because the mean of its divisors is an integer number (7476045577).

Almost surely, 2^42720260420 is an apocalyptic number.

It is an amenable number.

42720260420 is an abundant number, since it is smaller than the sum of its proper divisors (46992286504).

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

42720260420 is a wasteful number, since it uses less digits than its factorization.

42720260420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136013030 (or 2136013028 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The spelling of 42720260420 in words is "forty-two billion, seven hundred twenty million, two hundred sixty thousand, four hundred twenty".