405166 has 8 divisors (see below), whose sum is σ = 611784. Its totient is φ = 201240.

The previous prime is 405157. The next prime is 405179. The reversal of 405166 is 661504.

405166 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

405166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240 + ... + 931.

It is an arithmetic number, because the mean of its divisors is an integer number (76473).

2⁴⁰⁵¹⁶⁶ is an apocalyptic number.

405166 is a deficient number, since it is larger than the sum of its proper divisors (206618).

405166 is a wasteful number, since it uses less digits than its factorization.

405166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 405166 is about 636.5265116238. The cubic root of 405166 is about 73.9964692740.

The spelling of 405166 in words is "four hundred five thousand, one hundred sixty-six".