42870561 has 16 divisors (see below), whose sum is σ = 58171008. Its totient is φ = 28080000.

The previous prime is 42870547. The next prime is 42870571. The reversal of 42870561 is 16507824.

It is not a de Polignac number, because 42870561 - 2⁷ = 42870433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42870571) 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 15 ways as a sum of consecutive naturals, for example, 45285 + ... + 46221.

It is an arithmetic number, because the mean of its divisors is an integer number (3635688).

Almost surely, 2^42870561 is an apocalyptic number.

It is an amenable number.

42870561 is a deficient number, since it is larger than the sum of its proper divisors (15300447).

42870561 is a wasteful number, since it uses less digits than its factorization.

42870561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 42870561 is about 6547.5614544653. The cubic root of 42870561 is about 349.9879206716.

The spelling of 42870561 in words is "forty-two million, eight hundred seventy thousand, five hundred sixty-one".