42382009 has 4 divisors (see below), whose sum is σ = 42618960. Its totient is φ = 42145060.

The previous prime is 42381979. The next prime is 42382061. The reversal of 42382009 is 90028324.

42382009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42382009 - 2⁷ = 42381881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42382409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118207 + ... + 118564.

It is an arithmetic number, because the mean of its divisors is an integer number (10654740).

Almost surely, 2^42382009 is an apocalyptic number.

It is an amenable number.

42382009 is a deficient number, since it is larger than the sum of its proper divisors (236951).

42382009 is a wasteful number, since it uses less digits than its factorization.

42382009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236950.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 42382009 is about 6510.1466189326. The cubic root of 42382009 is about 348.6533532291.

The spelling of 42382009 in words is "forty-two million, three hundred eighty-two thousand, nine".