405106 has 8 divisors (see below), whose sum is σ = 654444. Its totient is φ = 186960.

The previous prime is 405091. The next prime is 405143. The reversal of 405106 is 601504.

It can be written as a sum of positive squares in 2 ways, for example, as 370881 + 34225 = 609^2 + 185^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×405106² = 328221742472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 405106.

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, 7765 + ... + 7816.

2⁴⁰⁵¹⁰⁶ is an apocalyptic number.

405106 is a deficient number, since it is larger than the sum of its proper divisors (249338).

405106 is a wasteful number, since it uses less digits than its factorization.

405106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15596.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 405106 is about 636.4793790847. The cubic root of 405106 is about 73.9928164441.

The spelling of 405106 in words is "four hundred five thousand, one hundred six".