42534561 has 16 divisors (see below), whose sum is σ = 62121600. Its totient is φ = 25767168.

The previous prime is 42534553. The next prime is 42534581. The reversal of 42534561 is 16543524.

It is not a de Polignac number, because 42534561 - 2³ = 42534553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42534581) 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, 12901 + ... + 15858.

It is an arithmetic number, because the mean of its divisors is an integer number (3882600).

Almost surely, 2^42534561 is an apocalyptic number.

It is an amenable number.

42534561 is a deficient number, since it is larger than the sum of its proper divisors (19587039).

42534561 is a wasteful number, since it uses less digits than its factorization.

42534561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28808.

The product of its digits is 14400, while the sum is 30.

The square root of 42534561 is about 6521.8525742307. The cubic root of 42534561 is about 349.0711726396.

The spelling of 42534561 in words is "forty-two million, five hundred thirty-four thousand, five hundred sixty-one".