42742566 has 20 divisors (see below), whose sum is σ = 95775372. Its totient is φ = 14247468.

The previous prime is 42742523. The next prime is 42742577. The reversal of 42742566 is 66524724.

It is a self number, because there is not a number n which added to its sum of digits gives 42742566.

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 131760 + ... + 132083.

Almost surely, 2^42742566 is an apocalyptic number.

42742566 is an abundant number, since it is smaller than the sum of its proper divisors (53032806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42742566 is a wasteful number, since it uses less digits than its factorization.

42742566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263857 (or 263848 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 42742566 is about 6537.7798984059. The cubic root of 42742566 is about 349.6392636999.

The spelling of 42742566 in words is "forty-two million, seven hundred forty-two thousand, five hundred sixty-six".