42131438 has 8 divisors (see below), whose sum is σ = 63275880. Its totient is φ = 21039480.

The previous prime is 42131431. The next prime is 42131483. The reversal of 42131438 is 83413124.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42131431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11048 + ... + 14363.

It is an arithmetic number, because the mean of its divisors is an integer number (7909485).

Almost surely, 2^42131438 is an apocalyptic number.

42131438 is a deficient number, since it is larger than the sum of its proper divisors (21144442).

42131438 is a wasteful number, since it uses less digits than its factorization.

42131438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26242.

The product of its digits is 2304, while the sum is 26.

The square root of 42131438 is about 6490.8734389141. The cubic root of 42131438 is about 347.9648916447.

The spelling of 42131438 in words is "forty-two million, one hundred thirty-one thousand, four hundred thirty-eight".