42085813 has 8 divisors (see below), whose sum is σ = 52470720. Its totient is φ = 32794080.

The previous prime is 42085811. The next prime is 42085819. The reversal of 42085813 is 31858024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42085813 - 2¹ = 42085811 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 (42085811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273208 + ... + 273361.

It is an arithmetic number, because the mean of its divisors is an integer number (6558840).

Almost surely, 2^42085813 is an apocalyptic number.

It is an amenable number.

42085813 is a deficient number, since it is larger than the sum of its proper divisors (10384907).

42085813 is a wasteful number, since it uses less digits than its factorization.

42085813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546587.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 42085813 is about 6487.3579367875. The cubic root of 42085813 is about 347.8392401663.

The spelling of 42085813 in words is "forty-two million, eighty-five thousand, eight hundred thirteen".