42489842 has 4 divisors (see below), whose sum is σ = 63734766. Its totient is φ = 21244920.

The previous prime is 42489841. The next prime is 42489877. The reversal of 42489842 is 24898424.

42489842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42393121 + 96721 = 6511^2 + 311^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42489842.

It is not an unprimeable number, because it can be changed into a prime (42489841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10622459 + ... + 10622462.

Almost surely, 2^42489842 is an apocalyptic number.

42489842 is a deficient number, since it is larger than the sum of its proper divisors (21244924).

42489842 is a wasteful number, since it uses less digits than its factorization.

42489842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21244923.

The product of its digits is 147456, while the sum is 41.

The square root of 42489842 is about 6518.4232756089. The cubic root of 42489842 is about 348.9487969589.

The spelling of 42489842 in words is "forty-two million, four hundred eighty-nine thousand, eight hundred forty-two".