42540117 has 4 divisors (see below), whose sum is σ = 56720160. Its totient is φ = 28360076.

The previous prime is 42540101. The next prime is 42540139. The reversal of 42540117 is 71104524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42540117 - 2⁴ = 42540101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42540167) 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 3 ways as a sum of consecutive naturals, for example, 7090017 + ... + 7090022.

It is an arithmetic number, because the mean of its divisors is an integer number (14180040).

Almost surely, 2^42540117 is an apocalyptic number.

It is an amenable number.

42540117 is a deficient number, since it is larger than the sum of its proper divisors (14180043).

42540117 is a wasteful number, since it uses less digits than its factorization.

42540117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14180042.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 42540117 is about 6522.2785129125. The cubic root of 42540117 is about 349.0863709078.

The spelling of 42540117 in words is "forty-two million, five hundred forty thousand, one hundred seventeen".