42120872 has 32 divisors (see below), whose sum is σ = 83647200. Its totient is φ = 19828800.

The previous prime is 42120857. The next prime is 42120877. The reversal of 42120872 is 27802124.

It is not an unprimeable number, because it can be changed into a prime (42120877) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26747 + ... + 28277.

It is an arithmetic number, because the mean of its divisors is an integer number (2613975).

Almost surely, 2^42120872 is an apocalyptic number.

It is an amenable number.

42120872 is a deficient number, since it is larger than the sum of its proper divisors (41526328).

42120872 is a wasteful number, since it uses less digits than its factorization.

42120872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737 (or 1733 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 42120872 is about 6490.0594758446. The cubic root of 42120872 is about 347.9358009022.

Adding to 42120872 its reverse (27802124), we get a palindrome (69922996).

The spelling of 42120872 in words is "forty-two million, one hundred twenty thousand, eight hundred seventy-two".