42100544 has 28 divisors (see below), whose sum is σ = 83876388. Its totient is φ = 20966400.

The previous prime is 42100543. The next prime is 42100549. The reversal of 42100544 is 44500124.

It can be written as a sum of positive squares in 2 ways, for example, as 27962944 + 14137600 = 5288^2 + 3760^2 .

It is a super-3 number, since 3×42100544³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42100543) 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, 16814 + ... + 19154.

Almost surely, 2^42100544 is an apocalyptic number.

It is an amenable number.

42100544 is a deficient number, since it is larger than the sum of its proper divisors (41775844).

42100544 is a wasteful number, since it uses less digits than its factorization.

42100544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42100544 is about 6488.4931995033. The cubic root of 42100544 is about 347.8798193366.

Adding to 42100544 its reverse (44500124), we get a palindrome (86600668).

The spelling of 42100544 in words is "forty-two million, one hundred thousand, five hundred forty-four".