42986817 has 6 divisors (see below), whose sum is σ = 62092082. Its totient is φ = 28657872.

The previous prime is 42986809. The next prime is 42986837. The reversal of 42986817 is 71868924.

It can be written as a sum of positive squares in only one way, i.e., 41525136 + 1461681 = 6444^2 + 1209^2 .

It is not a de Polignac number, because 42986817 - 2³ = 42986809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42986807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2388148 + ... + 2388165.

Almost surely, 2^42986817 is an apocalyptic number.

It is an amenable number.

42986817 is a deficient number, since it is larger than the sum of its proper divisors (19105265).

42986817 is a wasteful number, since it uses less digits than its factorization.

42986817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776319 (or 4776316 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 42986817 is about 6556.4332529204. The cubic root of 42986817 is about 350.3039998237.

The spelling of 42986817 in words is "forty-two million, nine hundred eighty-six thousand, eight hundred seventeen".