42406285 has 16 divisors (see below), whose sum is σ = 52018992. Its totient is φ = 33177600.

The previous prime is 42406261. The next prime is 42406289. The reversal of 42406285 is 58260424.

It can be written as a sum of positive squares in 8 ways, for example, as 376996 + 42029289 = 614^2 + 6483^2 .

It is not a de Polignac number, because 42406285 - 2¹⁵ = 42373517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42406289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78115 + ... + 78655.

It is an arithmetic number, because the mean of its divisors is an integer number (3251187).

Almost surely, 2^42406285 is an apocalyptic number.

It is an amenable number.

42406285 is a deficient number, since it is larger than the sum of its proper divisors (9612707).

42406285 is a wasteful number, since it uses less digits than its factorization.

42406285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 42406285 is about 6512.0108261581. The cubic root of 42406285 is about 348.7199089328.

The spelling of 42406285 in words is "forty-two million, four hundred six thousand, two hundred eighty-five".