406520 has 16 divisors (see below), whose sum is σ = 914760. Its totient is φ = 162592.

The previous prime is 406517. The next prime is 406531. The reversal of 406520 is 25604.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable 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, 5042 + ... + 5121.

2⁴⁰⁶⁵²⁰ is an apocalyptic number.

406520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

406520 is an abundant number, since it is smaller than the sum of its proper divisors (508240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406520 is a wasteful number, since it uses less digits than its factorization.

406520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10174 (or 10170 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 406520 is about 637.5892094445. The cubic root of 406520 is about 74.0788057471.

The spelling of 406520 in words is "four hundred six thousand, five hundred twenty".