42120552 has 16 divisors (see below), whose sum is σ = 105301440. Its totient is φ = 14040176.

The previous prime is 42120523. The next prime is 42120563. The reversal of 42120552 is 25502124.

It is a happy number.

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, 877488 + ... + 877535.

It is an arithmetic number, because the mean of its divisors is an integer number (6581340).

Almost surely, 2^42120552 is an apocalyptic number.

It is an amenable number.

42120552 is an abundant number, since it is smaller than the sum of its proper divisors (63180888).

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

42120552 is a wasteful number, since it uses less digits than its factorization.

42120552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755032 (or 1755028 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 42120552 is about 6490.0348227109. The cubic root of 42120552 is about 347.9349197893.

Adding to 42120552 its reverse (25502124), we get a palindrome (67622676).

The spelling of 42120552 in words is "forty-two million, one hundred twenty thousand, five hundred fifty-two".