42000439 has 16 divisors (see below), whose sum is σ = 48071520. Its totient is φ = 36408960.

The previous prime is 42000419. The next prime is 42000457. The reversal of 42000439 is 93400024.

It is a cyclic number.

It is not a de Polignac number, because 42000439 - 2¹⁵ = 41967671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42000419) 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, 12444 + ... + 15454.

It is an arithmetic number, because the mean of its divisors is an integer number (3004470).

Almost surely, 2^42000439 is an apocalyptic number.

42000439 is a deficient number, since it is larger than the sum of its proper divisors (6071081).

42000439 is a wasteful number, since it uses less digits than its factorization.

42000439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 42000439 is about 6480.7745679047. The cubic root of 42000439 is about 347.6038755762.

The spelling of 42000439 in words is "forty-two million, four hundred thirty-nine", and thus it is an aban number.