42100108 has 12 divisors (see below), whose sum is σ = 76052032. Its totient is φ = 20370960.

The previous prime is 42100103. The next prime is 42100111. The reversal of 42100108 is 80100124.

It is a happy number.

It is a super-2 number, since 2×42100108² = 3544838187223328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42100091 and 42100100.

It is not an unprimeable number, because it can be changed into a prime (42100103) 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, 169635 + ... + 169882.

Almost surely, 2^42100108 is an apocalyptic number.

It is an amenable number.

42100108 is a deficient number, since it is larger than the sum of its proper divisors (33951924).

42100108 is a wasteful number, since it uses less digits than its factorization.

42100108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339552 (or 339550 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 42100108 is about 6488.4596014771. The cubic root of 42100108 is about 347.8786184327.

Adding to 42100108 its sum of digits (16), we get a palindrome (42100124).

The spelling of 42100108 in words is "forty-two million, one hundred thousand, one hundred eight".