42721184 has 24 divisors (see below), whose sum is σ = 91754208. Its totient is φ = 19418560.

The previous prime is 42721183. The next prime is 42721201. The reversal of 42721184 is 48112724.

It is not an unprimeable number, because it can be changed into a prime (42721181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60332 + ... + 61035.

It is an arithmetic number, because the mean of its divisors is an integer number (3823092).

Almost surely, 2^42721184 is an apocalyptic number.

42721184 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42721184 is an abundant number, since it is smaller than the sum of its proper divisors (49033024).

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

42721184 is a wasteful number, since it uses less digits than its factorization.

42721184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121388 (or 121380 counting only the distinct ones).

The product of its digits is 3584, while the sum is 29.

The square root of 42721184 is about 6536.1444292488. The cubic root of 42721184 is about 349.5809515426.

The spelling of 42721184 in words is "forty-two million, seven hundred twenty-one thousand, one hundred eighty-four".