42065117 has 4 divisors (see below), whose sum is σ = 42498876. Its totient is φ = 41631360.

The previous prime is 42065099. The next prime is 42065119. The reversal of 42065117 is 71156024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15912121 + 26152996 = 3989^2 + 5114^2 .

It is a cyclic number.

It is not a de Polignac number, because 42065117 - 2¹² = 42061021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42065119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216734 + ... + 216927.

It is an arithmetic number, because the mean of its divisors is an integer number (10624719).

Almost surely, 2^42065117 is an apocalyptic number.

It is an amenable number.

42065117 is a deficient number, since it is larger than the sum of its proper divisors (433759).

42065117 is an equidigital number, since it uses as much as digits as its factorization.

42065117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433758.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 42065117 is about 6485.7626382716. The cubic root of 42065117 is about 347.7822133382.

The spelling of 42065117 in words is "forty-two million, sixty-five thousand, one hundred seventeen".