406415 has 4 divisors (see below), whose sum is σ = 487704. Its totient is φ = 325128.

The previous prime is 406403. The next prime is 406423. The reversal of 406415 is 514604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 406415 - 2¹⁸ = 144271 is a prime.

It is a Duffinian number.

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, 40637 + ... + 40646.

It is an arithmetic number, because the mean of its divisors is an integer number (121926).

2⁴⁰⁶⁴¹⁵ is an apocalyptic number.

406415 is a deficient number, since it is larger than the sum of its proper divisors (81289).

406415 is an equidigital number, since it uses as much as digits as its factorization.

406415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81288.

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

The square root of 406415 is about 637.5068627082. The cubic root of 406415 is about 74.0724272628.

It can be divided in two parts, 406 and 415, that multiplied together give a triangular number (168490 = T₅₈₀).

The spelling of 406415 in words is "four hundred six thousand, four hundred fifteen".