405445111 has 4 divisors (see below), whose sum is σ = 405602424. Its totient is φ = 405287800.

The previous prime is 405445099. The next prime is 405445133. The reversal of 405445111 is 111544504.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405445111 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 (405445141) 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, 74725 + ... + 79966.

It is an arithmetic number, because the mean of its divisors is an integer number (101400606).

Almost surely, 2^405445111 is an apocalyptic number.

405445111 is a deficient number, since it is larger than the sum of its proper divisors (157313).

405445111 is a wasteful number, since it uses less digits than its factorization.

405445111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157312.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 405445111 is about 20135.6676323384. The cubic root of 405445111 is about 740.1345695128.

Adding to 405445111 its reverse (111544504), we get a palindrome (516989615).

The spelling of 405445111 in words is "four hundred five million, four hundred forty-five thousand, one hundred eleven".