42404017 has 2 divisors, whose sum is σ = 42404018. Its totient is φ = 42404016.

The previous prime is 42403981. The next prime is 42404027. The reversal of 42404017 is 71040424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25765776 + 16638241 = 5076^2 + 4079^2 .

It is a cyclic number.

It is not a de Polignac number, because 42404017 - 2¹¹ = 42401969 is a prime.

It is equal to p_2570710 and since 42404017 and 2570710 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42404027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21202008 + 21202009.

It is an arithmetic number, because the mean of its divisors is an integer number (21202009).

Almost surely, 2^42404017 is an apocalyptic number.

It is an amenable number.

42404017 is a deficient number, since it is larger than the sum of its proper divisors (1).

42404017 is an equidigital number, since it uses as much as digits as its factorization.

42404017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 42404017 is about 6511.8366840700. The cubic root of 42404017 is about 348.7136920017.

The spelling of 42404017 in words is "forty-two million, four hundred four thousand, seventeen".