42280785 has 96 divisors (see below), whose sum is σ = 84913920. Its totient is φ = 20072448.

The previous prime is 42280783. The next prime is 42280787. The reversal of 42280785 is 58708224.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42280783) and next prime (42280787).

It is not a de Polignac number, because 42280785 - 2¹ = 42280783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42280783) 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 95 ways as a sum of consecutive naturals, for example, 475021 + ... + 475109.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^42280785 is an apocalyptic number.

42280785 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42280785 is an abundant number, since it is smaller than the sum of its proper divisors (42633135).

42280785 is a wasteful number, since it uses less digits than its factorization.

42280785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 42280785 is about 6502.3676457118. The cubic root of 42280785 is about 348.3755606619.

The spelling of 42280785 in words is "forty-two million, two hundred eighty thousand, seven hundred eighty-five".