42757687 has 16 divisors (see below), whose sum is σ = 50780160. Its totient is φ = 35225568.

The previous prime is 42757679. The next prime is 42757721. The reversal of 42757687 is 78675724.

It is not a de Polignac number, because 42757687 - 2³ = 42757679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42757987) 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, 70138 + ... + 70744.

It is an arithmetic number, because the mean of its divisors is an integer number (3173760).

Almost surely, 2^42757687 is an apocalyptic number.

42757687 is a deficient number, since it is larger than the sum of its proper divisors (8022473).

42757687 is a wasteful number, since it uses less digits than its factorization.

42757687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990.

The product of its digits is 658560, while the sum is 46.

The square root of 42757687 is about 6538.9362284702. The cubic root of 42757687 is about 349.6804893639.

The spelling of 42757687 in words is "forty-two million, seven hundred fifty-seven thousand, six hundred eighty-seven".