42438081 has 8 divisors (see below), whose sum is σ = 64667584. Its totient is φ = 24250320.

The previous prime is 42438061. The next prime is 42438091. The reversal of 42438081 is 18083424.

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

It is not a de Polignac number, because 42438081 - 2⁶ = 42438017 is a prime.

It is a super-2 number, since 2×42438081² = 3601981437925122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42438061) 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, 1010410 + ... + 1010451.

It is an arithmetic number, because the mean of its divisors is an integer number (8083448).

Almost surely, 2^42438081 is an apocalyptic number.

It is an amenable number.

42438081 is a deficient number, since it is larger than the sum of its proper divisors (22229503).

42438081 is a wasteful number, since it uses less digits than its factorization.

42438081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020871.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 42438081 is about 6514.4517037123. The cubic root of 42438081 is about 348.8070432508.

The spelling of 42438081 in words is "forty-two million, four hundred thirty-eight thousand, eighty-one".