42420556 has 12 divisors (see below), whose sum is σ = 77463792. Its totient is φ = 20288048.

The previous prime is 42420541. The next prime is 42420571. The reversal of 42420556 is 65502424.

It is an interprime number because it is at equal distance from previous prime (42420541) and next prime (42420571).

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 3 ways as a sum of consecutive naturals, for example, 230455 + ... + 230638.

It is an arithmetic number, because the mean of its divisors is an integer number (6455316).

Almost surely, 2^42420556 is an apocalyptic number.

42420556 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

42420556 is a deficient number, since it is larger than the sum of its proper divisors (35043236).

42420556 is a wasteful number, since it uses less digits than its factorization.

42420556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461120 (or 461118 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 42420556 is about 6513.1064784786. The cubic root of 42420556 is about 348.7590228178.

The spelling of 42420556 in words is "forty-two million, four hundred twenty thousand, five hundred fifty-six".