405340111 has 4 divisors (see below), whose sum is σ = 442189224. Its totient is φ = 368491000.

The previous prime is 405340099. The next prime is 405340139. The reversal of 405340111 is 111043504.

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 405340111 - 2⁷ = 405339983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405340141) 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, 18424540 + ... + 18424561.

It is an arithmetic number, because the mean of its divisors is an integer number (110547306).

Almost surely, 2^405340111 is an apocalyptic number.

405340111 is a deficient number, since it is larger than the sum of its proper divisors (36849113).

405340111 is a wasteful number, since it uses less digits than its factorization.

405340111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36849112.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 405340111 is about 20133.0601499126. The cubic root of 405340111 is about 740.0706719697.

Adding to 405340111 its reverse (111043504), we get a palindrome (516383615).

The spelling of 405340111 in words is "four hundred five million, three hundred forty thousand, one hundred eleven".