42002439 has 16 divisors (see below), whose sum is σ = 58966272. Its totient is φ = 26542208.

The previous prime is 42002431. The next prime is 42002449. The reversal of 42002439 is 93420024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42002439 - 2³ = 42002431 is a prime.

42002439 is a modest number, since divided by 2439 gives 420 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42002431) 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, 5104 + ... + 10490.

It is an arithmetic number, because the mean of its divisors is an integer number (3685392).

Almost surely, 2^42002439 is an apocalyptic number.

42002439 is a deficient number, since it is larger than the sum of its proper divisors (16963833).

42002439 is a wasteful number, since it uses less digits than its factorization.

42002439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5526.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 42002439 is about 6480.9288686114. The cubic root of 42002439 is about 347.6093929528.

The spelling of 42002439 in words is "forty-two million, two thousand, four hundred thirty-nine".