42205420 has 24 divisors (see below), whose sum is σ = 88830000. Its totient is φ = 16844352.

The previous prime is 42205381. The next prime is 42205421. The reversal of 42205420 is 2450224.

It is not an unprimeable number, because it can be changed into a prime (42205421) 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, 7866 + ... + 12094.

It is an arithmetic number, because the mean of its divisors is an integer number (3701250).

Almost surely, 2^42205420 is an apocalyptic number.

It is an amenable number.

42205420 is an abundant number, since it is smaller than the sum of its proper divisors (46624580).

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

42205420 is a wasteful number, since it uses less digits than its factorization.

42205420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4737 (or 4735 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42205420 is about 6496.5698641668. The cubic root of 42205420 is about 348.1684457788.

Adding to 42205420 its reverse (2450224), we get a palindrome (44655644).

The spelling of 42205420 in words is "forty-two million, two hundred five thousand, four hundred twenty".