42120424 has 32 divisors (see below), whose sum is σ = 83971080. Its totient is φ = 19738624.

The previous prime is 42120409. The next prime is 42120427. The reversal of 42120424 is 42402124.

It can be written as a sum of positive squares in 4 ways, for example, as 39463524 + 2656900 = 6282^2 + 1630^2 .

It is not an unprimeable number, because it can be changed into a prime (42120427) 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, 42624 + ... + 43600.

Almost surely, 2^42120424 is an apocalyptic number.

It is an amenable number.

42120424 is a deficient number, since it is larger than the sum of its proper divisors (41850656).

42120424 is a wasteful number, since it uses less digits than its factorization.

42120424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 42120424 is about 6490.0249614312. The cubic root of 42120424 is about 347.9345673428.

Adding to 42120424 its reverse (42402124), we get a palindrome (84522548).

The spelling of 42120424 in words is "forty-two million, one hundred twenty thousand, four hundred twenty-four".