42555771 has 12 divisors (see below), whose sum is σ = 61612200. Its totient is φ = 28304640.

The previous prime is 42555769. The next prime is 42555803. The reversal of 42555771 is 17755524.

It is not a de Polignac number, because 42555771 - 2¹ = 42555769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42555701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1225 + ... + 9306.

It is an arithmetic number, because the mean of its divisors is an integer number (5134350).

Almost surely, 2^42555771 is an apocalyptic number.

42555771 is a deficient number, since it is larger than the sum of its proper divisors (19056429).

42555771 is a wasteful number, since it uses less digits than its factorization.

42555771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10986 (or 10983 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 42555771 is about 6523.4784432847. The cubic root of 42555771 is about 349.1291848309.

The spelling of 42555771 in words is "forty-two million, five hundred fifty-five thousand, seven hundred seventy-one".