42405220 has 48 divisors (see below), whose sum is σ = 104626368. Its totient is φ = 14232960.

The previous prime is 42405197. The next prime is 42405269. The reversal of 42405220 is 2250424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4554 + ... + 10273.

It is an arithmetic number, because the mean of its divisors is an integer number (2179716).

Almost surely, 2^42405220 is an apocalyptic number.

It is an amenable number.

42405220 is an abundant number, since it is smaller than the sum of its proper divisors (62221148).

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

42405220 is a wasteful number, since it uses less digits than its factorization.

42405220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14860 (or 14858 counting only the distinct ones).

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

The square root of 42405220 is about 6511.9290536676. The cubic root of 42405220 is about 348.7169896343.

Adding to 42405220 its reverse (2250424), we get a palindrome (44655644).

The spelling of 42405220 in words is "forty-two million, four hundred five thousand, two hundred twenty".