409025 has 6 divisors (see below), whose sum is σ = 507222. Its totient is φ = 327200.

The previous prime is 409021. The next prime is 409027. The reversal of 409025 is 520904.

It can be written as a sum of positive squares in 3 ways, for example, as 14641 + 394384 = 121^2 + 628^2 .

It is not a de Polignac number, because 409025 - 2² = 409021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 408988 and 409006.

It is not an unprimeable number, because it can be changed into a prime (409021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8156 + ... + 8205.

It is an arithmetic number, because the mean of its divisors is an integer number (84537).

2⁴⁰⁹⁰²⁵ is an apocalyptic number.

It is an amenable number.

409025 is a deficient number, since it is larger than the sum of its proper divisors (98197).

409025 is a wasteful number, since it uses less digits than its factorization.

409025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16371 (or 16366 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 409025 is about 639.5506234850. The cubic root of 409025 is about 74.2306535847.

Adding to 409025 its reverse (520904), we get a palindrome (929929).

The spelling of 409025 in words is "four hundred nine thousand, twenty-five".