42405111 has 24 divisors (see below), whose sum is σ = 71713824. Its totient is φ = 23639040.

The previous prime is 42405107. The next prime is 42405113. The reversal of 42405111 is 11150424.

It is not a de Polignac number, because 42405111 - 2² = 42405107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42405113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5626 + ... + 10791.

It is an arithmetic number, because the mean of its divisors is an integer number (2988076).

Almost surely, 2^42405111 is an apocalyptic number.

42405111 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42405111 is a deficient number, since it is larger than the sum of its proper divisors (29308713).

42405111 is a wasteful number, since it uses less digits than its factorization.

42405111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16471 (or 16468 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 42405111 is about 6511.9206844064. The cubic root of 42405111 is about 348.7166908489.

Adding to 42405111 its reverse (11150424), we get a palindrome (53555535).

The spelling of 42405111 in words is "forty-two million, four hundred five thousand, one hundred eleven".