42485729 has 24 divisors (see below), whose sum is σ = 52742592. Its totient is φ = 33734880.

The previous prime is 42485719. The next prime is 42485743. The reversal of 42485729 is 92758424.

It is not a de Polignac number, because 42485729 - 2⁸ = 42485473 is a prime.

It is a super-2 number, since 2×42485729² = 3610074337322882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42485719) 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 23 ways as a sum of consecutive naturals, for example, 51212 + ... + 52034.

It is an arithmetic number, because the mean of its divisors is an integer number (2197608).

Almost surely, 2^42485729 is an apocalyptic number.

It is an amenable number.

42485729 is a deficient number, since it is larger than the sum of its proper divisors (10256863).

42485729 is a wasteful number, since it uses less digits than its factorization.

42485729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 866 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 42485729 is about 6518.1077775686. The cubic root of 42485729 is about 348.9375372268.

The spelling of 42485729 in words is "forty-two million, four hundred eighty-five thousand, seven hundred twenty-nine".