42020439 has 8 divisors (see below), whose sum is σ = 56293632. Its totient is φ = 27880440.

The previous prime is 42020437. The next prime is 42020441. The reversal of 42020439 is 93402024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42020437) and next prime (42020441).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42020439 - 2¹ = 42020437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32559 + ... + 33824.

It is an arithmetic number, because the mean of its divisors is an integer number (7036704).

Almost surely, 2^42020439 is an apocalyptic number.

42020439 is a deficient number, since it is larger than the sum of its proper divisors (14273193).

42020439 is a wasteful number, since it uses less digits than its factorization.

42020439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66597.

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

The square root of 42020439 is about 6482.3174096923. The cubic root of 42020439 is about 347.6590414624.

The spelling of 42020439 in words is "forty-two million, twenty thousand, four hundred thirty-nine".