42120984 has 16 divisors (see below), whose sum is σ = 105302520. Its totient is φ = 14040320.

The previous prime is 42120943. The next prime is 42121003. The reversal of 42120984 is 48902124.

It is a congruent 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, 877497 + ... + 877544.

Almost surely, 2^42120984 is an apocalyptic number.

It is an amenable number.

42120984 is an abundant number, since it is smaller than the sum of its proper divisors (63181536).

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

42120984 is a wasteful number, since it uses less digits than its factorization.

42120984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755050 (or 1755046 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 42120984 is about 6490.0681044192. The cubic root of 42120984 is about 347.9361092907.

The spelling of 42120984 in words is "forty-two million, one hundred twenty thousand, nine hundred eighty-four".