42140420 has 48 divisors (see below), whose sum is σ = 101756928. Its totient is φ = 14359680.

The previous prime is 42140419. The next prime is 42140443. The reversal of 42140420 is 2404124.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24509 + ... + 26171.

It is an arithmetic number, because the mean of its divisors is an integer number (2119936).

Almost surely, 2^42140420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42140420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50878464).

42140420 is an abundant number, since it is smaller than the sum of its proper divisors (59616508).

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

42140420 is a wasteful number, since it uses less digits than its factorization.

42140420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1858 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42140420 is about 6491.5652965983. The cubic root of 42140420 is about 347.9896174293.

Adding to 42140420 its reverse (2404124), we get a palindrome (44544544).

The spelling of 42140420 in words is "forty-two million, one hundred forty thousand, four hundred twenty".