42720258 has 24 divisors (see below), whose sum is σ = 99390672. Its totient is φ = 12205704.

The previous prime is 42720253. The next prime is 42720259. The reversal of 42720258 is 85202724.

It is not an unprimeable number, because it can be changed into a prime (42720253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72360 + ... + 72947.

It is an arithmetic number, because the mean of its divisors is an integer number (4141278).

Almost surely, 2^42720258 is an apocalyptic number.

42720258 is an abundant number, since it is smaller than the sum of its proper divisors (56670414).

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

42720258 is a wasteful number, since it uses less digits than its factorization.

42720258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145326 (or 145319 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 42720258 is about 6536.0735919970. The cubic root of 42720258 is about 349.5784257519.

The spelling of 42720258 in words is "forty-two million, seven hundred twenty thousand, two hundred fifty-eight".