42547761 has 20 divisors (see below), whose sum is σ = 64033200. Its totient is φ = 28153656.

The previous prime is 42547751. The next prime is 42547781. The reversal of 42547761 is 16774524.

42547761 is a `hidden beast` number, since 42 + 547 + 76 + 1 = 666.

It is not a de Polignac number, because 42547761 - 2⁹ = 42547249 is a prime.

It is a super-2 number, since 2×42547761² = 3620623932226242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42547721) 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 19 ways as a sum of consecutive naturals, for example, 9370 + ... + 13148.

It is an arithmetic number, because the mean of its divisors is an integer number (3201660).

Almost surely, 2^42547761 is an apocalyptic number.

It is an amenable number.

42547761 is a deficient number, since it is larger than the sum of its proper divisors (21485439).

42547761 is a wasteful number, since it uses less digits than its factorization.

42547761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930 (or 3921 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 42547761 is about 6522.8644781262. The cubic root of 42547761 is about 349.1072786735.

The spelling of 42547761 in words is "forty-two million, five hundred forty-seven thousand, seven hundred sixty-one".