42002111 has 4 divisors (see below), whose sum is σ = 42050352. Its totient is φ = 41953872.

The previous prime is 42002033. The next prime is 42002113. The reversal of 42002111 is 11120024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42002111 - 2¹⁰ = 42001087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42002092 and 42002101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42002113) 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, 22790 + ... + 24563.

It is an arithmetic number, because the mean of its divisors is an integer number (10512588).

Almost surely, 2^42002111 is an apocalyptic number.

42002111 is a deficient number, since it is larger than the sum of its proper divisors (48241).

42002111 is an equidigital number, since it uses as much as digits as its factorization.

42002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48240.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 42002111 is about 6480.9035635473. The cubic root of 42002111 is about 347.6084881151.

Adding to 42002111 its reverse (11120024), we get a palindrome (53122135).

The spelling of 42002111 in words is "forty-two million, two thousand, one hundred eleven".