42016517 has 2 divisors, whose sum is σ = 42016518. Its totient is φ = 42016516.

The previous prime is 42016489. The next prime is 42016519. The reversal of 42016517 is 71561024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37136836 + 4879681 = 6094^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 42016517 - 2⁶ = 42016453 is a prime.

It is a super-2 number, since 2×42016517² = 3530775401622578, which contains 22 as substring.

Together with 42016519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42016519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21008258 + 21008259.

It is an arithmetic number, because the mean of its divisors is an integer number (21008259).

Almost surely, 2^42016517 is an apocalyptic number.

It is an amenable number.

42016517 is a deficient number, since it is larger than the sum of its proper divisors (1).

42016517 is an equidigital number, since it uses as much as digits as its factorization.

42016517 is an evil number, because the sum of its binary digits is even.

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

The square root of 42016517 is about 6482.0148873633. The cubic root of 42016517 is about 347.6482248121.

The spelling of 42016517 in words is "forty-two million, sixteen thousand, five hundred seventeen".