42048981 has 24 divisors (see below), whose sum is σ = 66653496. Its totient is φ = 25384320.

The previous prime is 42048977. The next prime is 42048997. The reversal of 42048981 is 18984024.

42048981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3186225 + 38862756 = 1785^2 + 6234^2 .

It is not a de Polignac number, because 42048981 - 2² = 42048977 is a prime.

It is a super-2 number, since 2×42048981² = 3536233606276722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42048901) 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 in 23 ways as a sum of consecutive naturals, for example, 2811 + ... + 9591.

It is an arithmetic number, because the mean of its divisors is an integer number (2777229).

Almost surely, 2^42048981 is an apocalyptic number.

It is an amenable number.

42048981 is a deficient number, since it is larger than the sum of its proper divisors (24604515).

42048981 is a wasteful number, since it uses less digits than its factorization.

42048981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6853 (or 6850 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 42048981 is about 6484.5185634710. The cubic root of 42048981 is about 347.7377383916.

The spelling of 42048981 in words is "forty-two million, forty-eight thousand, nine hundred eighty-one".