42185385 has 24 divisors (see below), whose sum is σ = 79769664. Its totient is φ = 20453280.

The previous prime is 42185371. The next prime is 42185393. The reversal of 42185385 is 58358124.

It is a happy number.

It is not a de Polignac number, because 42185385 - 2¹⁹ = 41661097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42117 + ... + 43106.

It is an arithmetic number, because the mean of its divisors is an integer number (3323736).

Almost surely, 2^42185385 is an apocalyptic number.

42185385 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42185385 is a deficient number, since it is larger than the sum of its proper divisors (37584279).

42185385 is a wasteful number, since it uses less digits than its factorization.

42185385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85245 (or 85242 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 42185385 is about 6495.0277135667. The cubic root of 42185385 is about 348.1133449657.

The spelling of 42185385 in words is "forty-two million, one hundred eighty-five thousand, three hundred eighty-five".