42428417 has 2 divisors, whose sum is σ = 42428418. Its totient is φ = 42428416.

The previous prime is 42428369. The next prime is 42428437. The reversal of 42428417 is 71482424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38738176 + 3690241 = 6224^2 + 1921^2 .

It is a cyclic number.

It is not a de Polignac number, because 42428417 - 2⁸ = 42428161 is a prime.

It is not a weakly prime, because it can be changed into another prime (42428437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21214208 + 21214209.

It is an arithmetic number, because the mean of its divisors is an integer number (21214209).

Almost surely, 2^42428417 is an apocalyptic number.

It is an amenable number.

42428417 is a deficient number, since it is larger than the sum of its proper divisors (1).

42428417 is an equidigital number, since it uses as much as digits as its factorization.

42428417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14336, while the sum is 32.

The square root of 42428417 is about 6513.7099259946. The cubic root of 42428417 is about 348.7805644602.

The spelling of 42428417 in words is "forty-two million, four hundred twenty-eight thousand, four hundred seventeen".