409249 has 4 divisors (see below), whose sum is σ = 416020. Its totient is φ = 402480.

The previous prime is 409237. The next prime is 409259. The reversal of 409249 is 942904.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 117649 + 291600 = 343^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 409249 - 2⁵ = 409217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (409259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3294 + ... + 3415.

It is an arithmetic number, because the mean of its divisors is an integer number (104005).

2⁴⁰⁹²⁴⁹ is an apocalyptic number.

It is an amenable number.

409249 is a deficient number, since it is larger than the sum of its proper divisors (6771).

409249 is an equidigital number, since it uses as much as digits as its factorization.

409249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 409249 is about 639.7257224780. The cubic root of 409249 is about 74.2442017639.

The spelling of 409249 in words is "four hundred nine thousand, two hundred forty-nine".