42135420 has 24 divisors (see below), whose sum is σ = 117979344. Its totient is φ = 11236096.

The previous prime is 42135403. The next prime is 42135427. The reversal of 42135420 is 2453124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42135427) 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, 351069 + ... + 351188.

It is an arithmetic number, because the mean of its divisors is an integer number (4915806).

Almost surely, 2^42135420 is an apocalyptic number.

It is an amenable number.

42135420 is an abundant number, since it is smaller than the sum of its proper divisors (75843924).

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

42135420 is a wasteful number, since it uses less digits than its factorization.

42135420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702269 (or 702267 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42135420 is about 6491.1801700461. The cubic root of 42135420 is about 347.9758537877.

Adding to 42135420 its reverse (2453124), we get a palindrome (44588544).

The spelling of 42135420 in words is "forty-two million, one hundred thirty-five thousand, four hundred twenty".