405115 has 4 divisors (see below), whose sum is σ = 486144. Its totient is φ = 324088.

The previous prime is 405091. The next prime is 405143. The reversal of 405115 is 511504.

It is a happy number.

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-405115 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40507 + ... + 40516.

It is an arithmetic number, because the mean of its divisors is an integer number (121536).

2⁴⁰⁵¹¹⁵ is an apocalyptic number.

405115 is a deficient number, since it is larger than the sum of its proper divisors (81029).

405115 is an equidigital number, since it uses as much as digits as its factorization.

405115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81028.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 405115 is about 636.4864491880. The cubic root of 405115 is about 73.9933643916.

Adding to 405115 its reverse (511504), we get a palindrome (916619).

The spelling of 405115 in words is "four hundred five thousand, one hundred fifteen".