409725 has 24 divisors (see below), whose sum is σ = 753920. Its totient is φ = 218160.

The previous prime is 409723. The next prime is 409729. The reversal of 409725 is 527904.

It is not a de Polignac number, because 409725 - 2¹ = 409723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 372 + ... + 978.

2⁴⁰⁹⁷²⁵ is an apocalyptic number.

409725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

409725 is a deficient number, since it is larger than the sum of its proper divisors (344195).

409725 is a wasteful number, since it uses less digits than its factorization.

409725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 409725 is about 640.0976488006. The cubic root of 409725 is about 74.2729752388.

The spelling of 409725 in words is "four hundred nine thousand, seven hundred twenty-five".