42116849 has 4 divisors (see below), whose sum is σ = 42135540. Its totient is φ = 42098160.

The previous prime is 42116843. The next prime is 42116857. The reversal of 42116849 is 94861124.

It is a happy number.

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 23107249 + 19009600 = 4807^2 + 4360^2 .

It is a cyclic number.

It is not a de Polignac number, because 42116849 - 2⁸ = 42116593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42116843) 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, 5414 + ... + 10655.

It is an arithmetic number, because the mean of its divisors is an integer number (10533885).

Almost surely, 2^42116849 is an apocalyptic number.

It is an amenable number.

42116849 is a deficient number, since it is larger than the sum of its proper divisors (18691).

42116849 is a wasteful number, since it uses less digits than its factorization.

42116849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18690.

The product of its digits is 13824, while the sum is 35.

The square root of 42116849 is about 6489.7495329173. The cubic root of 42116849 is about 347.9247233356.

The spelling of 42116849 in words is "forty-two million, one hundred sixteen thousand, eight hundred forty-nine".