42566913 has 24 divisors (see below), whose sum is σ = 63468288. Its totient is φ = 27476352.

The previous prime is 42566899. The next prime is 42566921. The reversal of 42566913 is 31966524.

It is a happy number.

42566913 is a `hidden beast` number, since 4 + 2 + 566 + 91 + 3 = 666.

It is not a de Polignac number, because 42566913 - 2⁹ = 42566401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42566933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43081 + ... + 44057.

It is an arithmetic number, because the mean of its divisors is an integer number (2644512).

Almost surely, 2^42566913 is an apocalyptic number.

It is an amenable number.

42566913 is a deficient number, since it is larger than the sum of its proper divisors (20901375).

42566913 is a wasteful number, since it uses less digits than its factorization.

42566913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133 (or 1130 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 42566913 is about 6524.3323796385. The cubic root of 42566913 is about 349.1596519711.

The spelling of 42566913 in words is "forty-two million, five hundred sixty-six thousand, nine hundred thirteen".