406625 has 8 divisors (see below), whose sum is σ = 507624. Its totient is φ = 325200.

The previous prime is 406591. The next prime is 406631. The reversal of 406625 is 526604.

It can be written as a sum of positive squares in 4 ways, for example, as 8464 + 398161 = 92^2 + 631^2 .

It is not a de Polignac number, because 406625 - 2⁶ = 406561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 406625.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406625.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1502 + ... + 1751.

It is an arithmetic number, because the mean of its divisors is an integer number (63453).

2⁴⁰⁶⁶²⁵ is an apocalyptic number.

It is an amenable number.

406625 is a deficient number, since it is larger than the sum of its proper divisors (100999).

406625 is an equidigital number, since it uses as much as digits as its factorization.

406625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3268 (or 3258 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 406625 is about 637.6715455468. The cubic root of 406625 is about 74.0851831332.

The spelling of 406625 in words is "four hundred six thousand, six hundred twenty-five".