42100641 has 20 divisors (see below), whose sum is σ = 68609904. Its totient is φ = 25515000.

The previous prime is 42100631. The next prime is 42100661. The reversal of 42100641 is 14600124.

42100641 is a `hidden beast` number, since 4 + 21 + 0 + 0 + 641 = 666.

It is not a de Polignac number, because 42100641 - 2¹⁵ = 42067873 is a prime.

It is a super-2 number, since 2×42100641² = 3544927945221762, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42100631) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 22735 + ... + 24516.

Almost surely, 2^42100641 is an apocalyptic number.

It is an amenable number.

42100641 is a deficient number, since it is larger than the sum of its proper divisors (26509263).

42100641 is a wasteful number, since it uses less digits than its factorization.

42100641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47274 (or 47265 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 42100641 is about 6488.5006742698. The cubic root of 42100641 is about 347.8800865091.

Adding to 42100641 its reverse (14600124), we get a palindrome (56700765).

The spelling of 42100641 in words is "forty-two million, one hundred thousand, six hundred forty-one".