406375 has 8 divisors (see below), whose sum is σ = 507312. Its totient is φ = 325000.

The previous prime is 406361. The next prime is 406381. The reversal of 406375 is 573604.

It is not a de Polignac number, because 406375 - 2⁷ = 406247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

406375 is a lucky number.

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 7 ways as a sum of consecutive naturals, for example, 1501 + ... + 1750.

It is an arithmetic number, because the mean of its divisors is an integer number (63414).

2⁴⁰⁶³⁷⁵ is an apocalyptic number.

406375 is a deficient number, since it is larger than the sum of its proper divisors (100937).

406375 is an equidigital number, since it uses as much as digits as its factorization.

406375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266 (or 3256 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 406375 is about 637.4754897249. The cubic root of 406375 is about 74.0699970750.

Adding to 406375 its reverse (573604), we get a palindrome (979979).

The spelling of 406375 in words is "four hundred six thousand, three hundred seventy-five".