409225 has 6 divisors (see below), whose sum is σ = 507470. Its totient is φ = 327360.

The previous prime is 409217. The next prime is 409237. The reversal of 409225 is 522904.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 9801 + 399424 = 99^2 + 632^2 .

It is not a de Polignac number, because 409225 - 2³ = 409217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 409196 and 409205.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8160 + ... + 8209.

2⁴⁰⁹²²⁵ is an apocalyptic number.

It is an amenable number.

409225 is a deficient number, since it is larger than the sum of its proper divisors (98245).

409225 is a wasteful number, since it uses less digits than its factorization.

409225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16379 (or 16374 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 409225 is about 639.7069641641. The cubic root of 409225 is about 74.2427504098.

The spelling of 409225 in words is "four hundred nine thousand, two hundred twenty-five".