408625 has 16 divisors (see below), whose sum is σ = 584064. Its totient is φ = 279600.

The previous prime is 408623. The next prime is 408631. The reversal of 408625 is 526804.

It is not a de Polignac number, because 408625 - 2¹ = 408623 is a prime.

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

It is a d-powerful number, because it can be written as 4⁴ + 0 + 6⁴ + 8² + 2¹⁴ + 5⁸ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 408625.

It is not an unprimeable number, because it can be changed into a prime (408623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 642 + ... + 1108.

It is an arithmetic number, because the mean of its divisors is an integer number (36504).

2⁴⁰⁸⁶²⁵ is an apocalyptic number.

It is an amenable number.

408625 is a deficient number, since it is larger than the sum of its proper divisors (175439).

408625 is an equidigital number, since it uses as much as digits as its factorization.

408625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 408625 is about 639.2378274164. The cubic root of 408625 is about 74.2064480996.

The spelling of 408625 in words is "four hundred eight thousand, six hundred twenty-five".