42189345 has 48 divisors (see below), whose sum is σ = 82555200. Its totient is φ = 19743360.

The previous prime is 42189313. The next prime is 42189347. The reversal of 42189345 is 54398124.

It is not a de Polignac number, because 42189345 - 2⁵ = 42189313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42189347) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12886 + ... + 15824.

It is an arithmetic number, because the mean of its divisors is an integer number (1719900).

Almost surely, 2^42189345 is an apocalyptic number.

42189345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42189345 is a deficient number, since it is larger than the sum of its proper divisors (40365855).

42189345 is a wasteful number, since it uses less digits than its factorization.

42189345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990 (or 2987 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 42189345 is about 6495.3325549967. The cubic root of 42189345 is about 348.1242372508.

The spelling of 42189345 in words is "forty-two million, one hundred eighty-nine thousand, three hundred forty-five".