409415 has 4 divisors (see below), whose sum is σ = 491304. Its totient is φ = 327528.

The previous prime is 409397. The next prime is 409429. The reversal of 409415 is 514904.

409415 = 102² + 103² + ... + 131².

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 409415 - 2⁶ = 409351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40937 + ... + 40946.

It is an arithmetic number, because the mean of its divisors is an integer number (122826).

2⁴⁰⁹⁴¹⁵ is an apocalyptic number.

409415 is a deficient number, since it is larger than the sum of its proper divisors (81889).

409415 is an equidigital number, since it uses as much as digits as its factorization.

409415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81888.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 409415 is about 639.8554524266. The cubic root of 409415 is about 74.2542387435.

The spelling of 409415 in words is "four hundred nine thousand, four hundred fifteen".