42134420 has 24 divisors (see below), whose sum is σ = 88609248. Its totient is φ = 16829600.

The previous prime is 42134401. The next prime is 42134431. The reversal of 42134420 is 2443124.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 42134392 and 42134401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20855 + ... + 22785.

It is an arithmetic number, because the mean of its divisors is an integer number (3692052).

Almost surely, 2^42134420 is an apocalyptic number.

It is an amenable number.

42134420 is an abundant number, since it is smaller than the sum of its proper divisors (46474828).

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

42134420 is a wasteful number, since it uses less digits than its factorization.

42134420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 42134420 is about 6491.1031419937. The cubic root of 42134420 is about 347.9731009287.

Adding to 42134420 its reverse (2443124), we get a palindrome (44577544).

The spelling of 42134420 in words is "forty-two million, one hundred thirty-four thousand, four hundred twenty".