42913985 has 8 divisors (see below), whose sum is σ = 52149120. Its totient is φ = 33896304.

The previous prime is 42913979. The next prime is 42913987. The reversal of 42913985 is 58931924.

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

It is a cyclic number.

It is not a de Polignac number, because 42913985 - 2¹⁸ = 42651841 is a prime.

It is a super-2 number, since 2×42913985² = 3683220217160450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42913987) 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 7 ways as a sum of consecutive naturals, for example, 53927 + ... + 54716.

It is an arithmetic number, because the mean of its divisors is an integer number (6518640).

Almost surely, 2^42913985 is an apocalyptic number.

It is an amenable number.

42913985 is a deficient number, since it is larger than the sum of its proper divisors (9235135).

42913985 is a wasteful number, since it uses less digits than its factorization.

42913985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108727.

The product of its digits is 77760, while the sum is 41.

The square root of 42913985 is about 6550.8766588908. The cubic root of 42913985 is about 350.1060494966.

The spelling of 42913985 in words is "forty-two million, nine hundred thirteen thousand, nine hundred eighty-five".