409522 has 8 divisors (see below), whose sum is σ = 621936. Its totient is φ = 202212.

The previous prime is 409517. The next prime is 409523. The reversal of 409522 is 225904.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 409493 and 409502.

It is not an unprimeable number, because it can be changed into a prime (409523) 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, 1068 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (77742).

2⁴⁰⁹⁵²² is an apocalyptic number.

409522 is a deficient number, since it is larger than the sum of its proper divisors (212414).

409522 is a wasteful number, since it uses less digits than its factorization.

409522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552.

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

The square root of 409522 is about 639.9390595986. The cubic root of 409522 is about 74.2607069249.

The spelling of 409522 in words is "four hundred nine thousand, five hundred twenty-two".