42185073 has 16 divisors (see below), whose sum is σ = 67665920. Its totient is φ = 22836816.

The previous prime is 42185063. The next prime is 42185081. The reversal of 42185073 is 37058124.

It is not a de Polignac number, because 42185073 - 2⁹ = 42184561 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42185073.

It is not an unprimeable number, because it can be changed into a prime (42185063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52465 + ... + 53262.

It is an arithmetic number, because the mean of its divisors is an integer number (4229120).

Almost surely, 2^42185073 is an apocalyptic number.

It is an amenable number.

42185073 is a deficient number, since it is larger than the sum of its proper divisors (25480847).

42185073 is a wasteful number, since it uses less digits than its factorization.

42185073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105756.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 42185073 is about 6495.0036951491. The cubic root of 42185073 is about 348.1124867567.

The spelling of 42185073 in words is "forty-two million, one hundred eighty-five thousand, seventy-three".