42131406 has 16 divisors (see below), whose sum is σ = 89219664. Its totient is φ = 13217664.

The previous prime is 42131399. The next prime is 42131407. The reversal of 42131406 is 60413124.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42131407) 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, 206425 + ... + 206628.

It is an arithmetic number, because the mean of its divisors is an integer number (5576229).

Almost surely, 2^42131406 is an apocalyptic number.

42131406 is an abundant number, since it is smaller than the sum of its proper divisors (47088258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42131406 is a wasteful number, since it uses less digits than its factorization.

42131406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413075.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 42131406 is about 6490.8709739141. The cubic root of 42131406 is about 347.9648035483.

The spelling of 42131406 in words is "forty-two million, one hundred thirty-one thousand, four hundred six".