42571555 has 16 divisors (see below), whose sum is σ = 55538784. Its totient is φ = 31138560.

The previous prime is 42571549. The next prime is 42571559. The reversal of 42571555 is 55517524.

It is not a de Polignac number, because 42571555 - 2⁵ = 42571523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42571555.

It is not an unprimeable number, because it can be changed into a prime (42571559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3895 + ... + 10015.

It is an arithmetic number, because the mean of its divisors is an integer number (3471174).

Almost surely, 2^42571555 is an apocalyptic number.

42571555 is a deficient number, since it is larger than the sum of its proper divisors (12967229).

42571555 is a wasteful number, since it uses less digits than its factorization.

42571555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6246.

The product of its digits is 35000, while the sum is 34.

The square root of 42571555 is about 6524.6881151516. The cubic root of 42571555 is about 349.1723436768.

The spelling of 42571555 in words is "forty-two million, five hundred seventy-one thousand, five hundred fifty-five".