405146 has 16 divisors (see below), whose sum is σ = 711744. Its totient is φ = 169344.

The previous prime is 405143. The next prime is 405157. The reversal of 405146 is 641504.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (405143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (44484).

2⁴⁰⁵¹⁴⁶ is an apocalyptic number.

405146 is a deficient number, since it is larger than the sum of its proper divisors (306598).

405146 is a wasteful number, since it uses less digits than its factorization.

405146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 405146 is about 636.5108011652. The cubic root of 405146 is about 73.9952517041.

The spelling of 405146 in words is "four hundred five thousand, one hundred forty-six".