42111100 has 36 divisors (see below), whose sum is σ = 93619008. Its totient is φ = 16432000.

The previous prime is 42111079. The next prime is 42111101. The reversal of 42111100 is 111124.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42111101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1036 + ... + 9235.

It is an arithmetic number, because the mean of its divisors is an integer number (2600528).

Almost surely, 2^42111100 is an apocalyptic number.

It is an amenable number.

42111100 is an abundant number, since it is smaller than the sum of its proper divisors (51507908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42111100 is a wasteful number, since it uses less digits than its factorization.

42111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10326 (or 10319 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 42111100 is about 6489.3065885347. The cubic root of 42111100 is about 347.9088919024.

Adding to 42111100 its reverse (111124), we get a palindrome (42222224).

The spelling of 42111100 in words is "forty-two million, one hundred eleven thousand, one hundred".